VintageBigBlue.org

 

Re: Ovision upgrade


Mar 12, 2009

 


----------------------------

#42104 Mar 12, 2009

After following many posts about the Ovision worm upgrade, I was not clear about the current pricing. Will the new cost be $250? I have just received notification & the specs for my ordered worm so I thought I'd ask Franck the question & with his permission, here is the response:



"hello Al



the option with 250 is the housing only for dec axis



the NS-01303009 is the complet kit with test

as the housing only is quite difficult to assembly

i send to a costumer who previously buy a complete kit another housing reday to mount on his dec axis mount.

this is not tested and i do not guaranty the quality of worm.



this mounting allow to easy adjust mesching of dec backlash worm-gear

regards

Franck"



Hope this is helpful.

Al



----------------------------

#43683 Aug 16, 2009

Looking for some feedback regarding how to best interpret my phd logs.



Prior to adding the Ovision worm I appeared to be getting 10-12 PE and the infamous 76.2 error message and felt it was worth the additional funds to upgrade.

I did the upgrade yesterday however I'm not sure if the curve I'm seeing is correct.



What I'm reading on the PEA graph in PecPrep is under 5.3 peak to peak however it looks funny as opposed to a nice up and down symetrical curve.

Also the PEC tab shows 3-3 peaks however still not observing what I've seen others show.



The data was gathered with PHD using the guiding solution however I had the guide commands output disabled.

So the results are not guided.



Lost the guide star during the last five minutes so maybe this is the result I'm seeing.



Any input or feedback would be greatly appreciated.



Thanks in advance.

Troy



----------------------------

#43688 Aug 16, 2009

You will not see a perfectly smooth undulating curve due to the atmospheric disturbance and noise from the gearbox and other items. You will see spikes and dips and such things, bt the reduction to 5.2" is not bad at all. On a better night with steady air, the PE may show a better curve and the 5.3" may be reduced as well.

Also, adjustment of the worm lash will result in the best possible PE and curve, so you may want to play with this adjustment to see if you can improve things.

Floyd --- In Losmandy_users@yahoogroups.com, "Troy" sere_team@...> wrote:

>

> Looking for some feedback regarding how to best interpret my phd logs.

>

> Prior to adding the Ovision worm I appeared to be getting 10-12 PE and the infamous 76.2 error message and felt it was worth the additional funds to upgrade.

> I did the upgrade yesterday however I'm not sure if the curve I'm seeing is correct.

>

> What I'm reading on the PEA graph in PecPrep is under 5.3 peak to peak however it looks funny as opposed to a nice up and down symetrical curve.

> Also the PEC tab shows 3-3 peaks however still not observing what I've seen others show.

>

> The data was gathered with PHD using the guiding solution however I had the guide commands output disabled.

> So the results are not guided.

>

> Lost the guide star during the last five minutes so maybe this is the result I'm seeing.

>

> Any input or feedback would be greatly appreciated.

>

> Thanks in advance.

> Troy

>



----------------------------

#43692 Aug 17, 2009

Hi Floyd



Last night the conditions were very poor so that explains it.



When reading the install instructions there was a comment amount having 1-2 mm of play in RA when its secure and grabbing the DEC shaft to test movement.



I'm assuming this is referencing the lash your mentioning?

As of now no play at all in RA which was also the case prior to the upgrade of the worm.



Troy



--- In Losmandy_users@yahoogroups.com, "Floyd Blue" fblue@...> wrote:

>

> You will not see a perfectly smooth undulating curve due to the atmospheric disturbance and noise from the gearbox and other items. You will see spikes and dips and such things, bt the reduction to 5.2" is not bad at all. On a better night with steady air, the PE may show a better curve and the 5.3" may be reduced as well.

> Also, adjustment of the worm lash will result in the best possible PE and curve, so you may want to play with this adjustment to see if you can improve things.

> Floyd

> --- In Losmandy_users@yahoogroups.com, "Troy" sere_team@> wrote:

> >

> > Looking for some feedback regarding how to best interpret my phd logs.

> >

> > Prior to adding the Ovision worm I appeared to be getting 10-12 PE and the infamous 76.2 error message and felt it was worth the additional funds to upgrade.

> > I did the upgrade yesterday however I'm not sure if the curve I'm seeing is correct.

> >

> > What I'm reading on the PEA graph in PecPrep is under 5.3 peak to peak however it looks funny as opposed to a nice up and down symetrical curve.

> > Also the PEC tab shows 3-3 peaks however still not observing what I've seen others show.

> >

> > The data was gathered with PHD using the guiding solution however I had the guide commands output disabled.

> > So the results are not guided.

> >

> > Lost the guide star during the last five minutes so maybe this is the result I'm seeing.

> >

> > Any input or feedback would be greatly appreciated.

> >

> > Thanks in advance.

> > Troy

> >

>







----------------------------

#45652 Apr 24, 2010

Hi Guys,

I purchased a new Losmandy G11 in late 2009. I am imaging with a 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the Starshoot autoguider. I have not been happy with the R.A. accuracy of the guiding and am thinking of purchasing the Ovision NS kit as an upgrade. Would like to hear results other users may have had with this conversion and whether the extra expense is worth it. Thanks.

Rick



----------------------------

#45653 Apr 24, 2010

Hi, Rick -



As far as I'm concerned, there's no question the Ovision upgrade

improves the mount's performance, as illustrated by the graphs you can

see here:

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

vision%20testing/

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

Ovision%20testing/>



However, what I would suggest you do is first address any fundamental

tuning of the mount, such as checking the alignment of the worm blocks,

your RA backlash, balance, etc. Presumably you have the high precision

brass worm and it may just need "run-in" for awhile. You should also

train the mount's PEC.



Now, since you too have the Orion ST-80, there is one other improvement

that I'd like to suggest. I've been testing a simple modification for

the past couple days and so far I've seen an improvement in guiding.

Remove the central part of the guidscope's cover to stop down the

aperture. I'm publishing this a little sooner than I had planned to and

would like to conduct some further testing. But, so far, I'm seeing a

reduction in RMS values from the .24 - .30 range down to .16 - .21

(pixels), using the same camera as you are. That equates to 1

arc-second tracking.



If nothing else, you will have established a consistent baseline for

further testing.



Will be interested in hearing of your progress.



Regards,



Bill Shaheen

Gold Canyon, AZ

USA



















--- In Losmandy_users@yahoogroups.com, "RickK" rickkaz@...> wrote:

>

> Hi Guys,

> I purchased a new Losmandy G11 in late 2009. I am imaging with a

1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

Starshoot autoguider. I have not been happy with the R.A. accuracy of

the guiding and am thinking of purchasing the Ovision NS kit as an

upgrade. Would like to hear results other users may have had with this

conversion and whether the extra expense is worth it. Thanks.

> Rick

>









[Non-text portions of this message have been removed]



----------------------------

#45654 Apr 24, 2010

Hello Bill,

You piqued my curiosity since I have an ST80, although I am currently guiding with a miniborg50. Now my ST80 has 3 parts: the focuser (I upgraded to a 2" crayford), the main tube and the front cover. When you mention removing the central cover, are you referring to the main tube and bring the objective closer to the focuser?

Thanks

Olivier

--- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@...> wrote:

>

>

> Hi, Rick -

>

> As far as I'm concerned, there's no question the Ovision upgrade

> improves the mount's performance, as illustrated by the graphs you can

> see here:

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> vision%20testing/

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> Ovision%20testing/>

>

> However, what I would suggest you do is first address any fundamental

> tuning of the mount, such as checking the alignment of the worm blocks,

> your RA backlash, balance, etc. Presumably you have the high precision

> brass worm and it may just need "run-in" for awhile. You should also

> train the mount's PEC.

>

> Now, since you too have the Orion ST-80, there is one other improvement

> that I'd like to suggest. I've been testing a simple modification for

> the past couple days and so far I've seen an improvement in guiding.

> Remove the central part of the guidscope's cover to stop down the

> aperture. I'm publishing this a little sooner than I had planned to and

> would like to conduct some further testing. But, so far, I'm seeing a

> reduction in RMS values from the .24 - .30 range down to .16 - .21

> (pixels), using the same camera as you are. That equates to 1

> arc-second tracking.

>

> If nothing else, you will have established a consistent baseline for

> further testing.

>

> Will be interested in hearing of your progress.

>

> Regards,

>

> Bill Shaheen

> Gold Canyon, AZ

> USA

>



----------------------------

#45655 Apr 24, 2010

Hi Rick,

I did the upgrade to the Ovision worm and it is well worth it. I can image at 2000 mm (F/10) and that was not possible (for me at least) before the upgrade.

Regards

Olivier

--- In Losmandy_users@yahoogroups.com, "RickK" rickkaz@...> wrote:

>

> Hi Guys,

> I purchased a new Losmandy G11 in late 2009. I am imaging with a 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the Starshoot autoguider. I have not been happy with the R.A. accuracy of the guiding and am thinking of purchasing the Ovision NS kit as an upgrade. Would like to hear results other users may have had with this conversion and whether the extra expense is worth it. Thanks.

> Rick

>







----------------------------

#45658 Apr 24, 2010

Bill,

Got it, thanks. At first I thought there was something near the objective cell and I could not tell what you were referring to.

My DSI Pro has bit the dust and I ordered an Orion SSAG today, which is fine since we are going to get 5 days of rain in the area. Hopefully next weekend, I can mount the ST80 on the C8 and reproduce your experiment. Going to F9 increases the image scale so the centroid calculation ought to be more accurate, leading to better guiding. At least on paper, but you seem to have confirmed it and it will be worth trying because I am going to need external guiding to image in color at 2000 mm fl.



Olivier

--- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@...> wrote:

>

>

> Hello, my old friend -

>

> No, not bringing it closer. The ST-80's front cover (the black cover

> that fits over the dew shield) has a removable central smaller cap,

> precisely to increase the focal ratio. Leave the larger cover in place

> and remove just the smaller cover. What this does is reduce the

> aperture to approx. 45mm and increase the f/r from f/5 to about f/9. In

> addition to limiting the exposure to the central portion of the optics,

> it increases the FWHM of the guide star - nearly doubling it. To me,

> this produces a more accurate star profile and spreads it across more

> pixels.

>

> I've seen a visible improvement in the guide star's image on the PHD

> screen (no coma). And I believe that with the f/5 aperture we've been

> experiencing spradic errors causing PHD to produce unnecessary

> corrections as evidenced by an erratic graph.

>

> As I say, since I first tried this I've had 3 consecutive nights of

> significantly improved guiding. The test that's needed is to run a

> continuous guide session during which I alternately install and remove

> the entire cover (with the middle cover removed). Hope to do that

> tonight.

>

> In fact, I was hoping to publish a call to those using the same guide

> scope to replicate this test. (Floyd - you listening? :O) )

>

> Regards,

>

> Bill

>

>

>

> --- In Losmandy_users@yahoogroups.com, "Olivier" oprache@> wrote:

> >

> > Hello Bill,

> > You piqued my curiosity since I have an ST80, although I am currently

> guiding with a miniborg50. Now my ST80 has 3 parts: the focuser (I

> upgraded to a 2" crayford), the main tube and the front cover. When you

> mention removing the central cover, are you referring to the main tube

> and bring the objective closer to the focuser?

> > Thanks

> > Olivier

> >

> > --- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@ wrote:

> > >

> > >

> > > Hi, Rick -

> > >

> > > As far as I'm concerned, there's no question the Ovision upgrade

> > > improves the mount's performance, as illustrated by the graphs you

> can

> > > see here:

> > >

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> \

> > > vision%20testing/

> > >

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> \

> > > Ovision%20testing/>

> > >

> > > However, what I would suggest you do is first address any

> fundamental

> > > tuning of the mount, such as checking the alignment of the worm

> blocks,

> > > your RA backlash, balance, etc. Presumably you have the high

> precision

> > > brass worm and it may just need "run-in" for awhile. You should also

> > > train the mount's PEC.

> > >

> > > Now, since you too have the Orion ST-80, there is one other

> improvement

> > > that I'd like to suggest. I've been testing a simple modification

> for

> > > the past couple days and so far I've seen an improvement in guiding.

> > > Remove the central part of the guidscope's cover to stop down the

> > > aperture. I'm publishing this a little sooner than I had planned to

> and

> > > would like to conduct some further testing. But, so far, I'm seeing

> a

> > > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > > (pixels), using the same camera as you are. That equates to 1

> > > arc-second tracking.

> > >

> > > If nothing else, you will have established a consistent baseline for

> > > further testing.

> > >

> > > Will be interested in hearing of your progress.

> > >

> > > Regards,

> > >

> > > Bill Shaheen

> > > Gold Canyon, AZ

> > > USA

> > >

> >

>



----------------------------

#45659 Apr 24, 2010

Out of deference to the original poster, I'll start a new thread when the time comes. By the way, it should not increase the image scale since the focal length would remain the same.



Regards,



Bill

--- In Losmandy_users@yahoogroups.com, "Olivier" oprache@...> wrote:

>

> Bill,

> Got it, thanks. At first I thought there was something near the objective cell and I could not tell what you were referring to.

> My DSI Pro has bit the dust and I ordered an Orion SSAG today, which is fine since we are going to get 5 days of rain in the area. Hopefully next weekend, I can mount the ST80 on the C8 and reproduce your experiment. Going to F9 increases the image scale so the centroid calculation ought to be more accurate, leading to better guiding. At least on paper, but you seem to have confirmed it and it will be worth trying because I am going to need external guiding to image in color at 2000 mm fl.

>

> Olivier

>

> --- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@> wrote:

> >

> >

> > Hello, my old friend -

> >

> > No, not bringing it closer. The ST-80's front cover (the black cover

> > that fits over the dew shield) has a removable central smaller cap,

> > precisely to increase the focal ratio. Leave the larger cover in place

> > and remove just the smaller cover. What this does is reduce the

> > aperture to approx. 45mm and increase the f/r from f/5 to about f/9. In

> > addition to limiting the exposure to the central portion of the optics,

> > it increases the FWHM of the guide star - nearly doubling it. To me,

> > this produces a more accurate star profile and spreads it across more

> > pixels.

> >

> > I've seen a visible improvement in the guide star's image on the PHD

> > screen (no coma). And I believe that with the f/5 aperture we've been

> > experiencing spradic errors causing PHD to produce unnecessary

> > corrections as evidenced by an erratic graph.

> >

> > As I say, since I first tried this I've had 3 consecutive nights of

> > significantly improved guiding. The test that's needed is to run a

> > continuous guide session during which I alternately install and remove

> > the entire cover (with the middle cover removed). Hope to do that

> > tonight.

> >

> > In fact, I was hoping to publish a call to those using the same guide

> > scope to replicate this test. (Floyd - you listening? :O) )

> >

> > Regards,

> >

> > Bill

> >

> >

> >

> > --- In Losmandy_users@yahoogroups.com, "Olivier" oprache@> wrote:

> > >

> > > Hello Bill,

> > > You piqued my curiosity since I have an ST80, although I am currently

> > guiding with a miniborg50. Now my ST80 has 3 parts: the focuser (I

> > upgraded to a 2" crayford), the main tube and the front cover. When you

> > mention removing the central cover, are you referring to the main tube

> > and bring the objective closer to the focuser?

> > > Thanks

> > > Olivier

> > >

> > > --- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@ wrote:

> > > >

> > > >

> > > > Hi, Rick -

> > > >

> > > > As far as I'm concerned, there's no question the Ovision upgrade

> > > > improves the mount's performance, as illustrated by the graphs you

> > can

> > > > see here:

> > > >

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> > \

> > > > vision%20testing/

> > > >

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> > \

> > > > Ovision%20testing/>

> > > >

> > > > However, what I would suggest you do is first address any

> > fundamental

> > > > tuning of the mount, such as checking the alignment of the worm

> > blocks,

> > > > your RA backlash, balance, etc. Presumably you have the high

> > precision

> > > > brass worm and it may just need "run-in" for awhile. You should also

> > > > train the mount's PEC.

> > > >

> > > > Now, since you too have the Orion ST-80, there is one other

> > improvement

> > > > that I'd like to suggest. I've been testing a simple modification

> > for

> > > > the past couple days and so far I've seen an improvement in guiding.

> > > > Remove the central part of the guidscope's cover to stop down the

> > > > aperture. I'm publishing this a little sooner than I had planned to

> > and

> > > > would like to conduct some further testing. But, so far, I'm seeing

> > a

> > > > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > > > (pixels), using the same camera as you are. That equates to 1

> > > > arc-second tracking.

> > > >

> > > > If nothing else, you will have established a consistent baseline for

> > > > further testing.

> > > >

> > > > Will be interested in hearing of your progress.

> > > >

> > > > Regards,

> > > >

> > > > Bill Shaheen

> > > > Gold Canyon, AZ

> > > > USA

> > > >

> > >

> >

>







----------------------------

#45661 Apr 24, 2010

Hi Bill,

Sorry, but I sold my ST-80 and got the 50mm Borg, so I do not have it any more.

Floyd --- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@...> wrote:

>

>

> Hello, my old friend -

>

> No, not bringing it closer. The ST-80's front cover (the black cover

> that fits over the dew shield) has a removable central smaller cap,

> precisely to increase the focal ratio. Leave the larger cover in place

> and remove just the smaller cover. What this does is reduce the

> aperture to approx. 45mm and increase the f/r from f/5 to about f/9. In

> addition to limiting the exposure to the central portion of the optics,

> it increases the FWHM of the guide star - nearly doubling it. To me,

> this produces a more accurate star profile and spreads it across more

> pixels.

>

> I've seen a visible improvement in the guide star's image on the PHD

> screen (no coma). And I believe that with the f/5 aperture we've been

> experiencing spradic errors causing PHD to produce unnecessary

> corrections as evidenced by an erratic graph.

>

> As I say, since I first tried this I've had 3 consecutive nights of

> significantly improved guiding. The test that's needed is to run a

> continuous guide session during which I alternately install and remove

> the entire cover (with the middle cover removed). Hope to do that

> tonight.

>

> In fact, I was hoping to publish a call to those using the same guide

> scope to replicate this test. (Floyd - you listening? :O) )

>

> Regards,

>

> Bill

>

>

>

> --- In Losmandy_users@yahoogroups.com, "Olivier" oprache@> wrote:

> >

> > Hello Bill,

> > You piqued my curiosity since I have an ST80, although I am currently

> guiding with a miniborg50. Now my ST80 has 3 parts: the focuser (I

> upgraded to a 2" crayford), the main tube and the front cover. When you

> mention removing the central cover, are you referring to the main tube

> and bring the objective closer to the focuser?

> > Thanks

> > Olivier

> >

> > --- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@ wrote:

> > >

> > >

> > > Hi, Rick -

> > >

> > > As far as I'm concerned, there's no question the Ovision upgrade

> > > improves the mount's performance, as illustrated by the graphs you

> can

> > > see here:

> > >

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> \

> > > vision%20testing/

> > >

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> \

> > > Ovision%20testing/>

> > >

> > > However, what I would suggest you do is first address any

> fundamental

> > > tuning of the mount, such as checking the alignment of the worm

> blocks,

> > > your RA backlash, balance, etc. Presumably you have the high

> precision

> > > brass worm and it may just need "run-in" for awhile. You should also

> > > train the mount's PEC.

> > >

> > > Now, since you too have the Orion ST-80, there is one other

> improvement

> > > that I'd like to suggest. I've been testing a simple modification

> for

> > > the past couple days and so far I've seen an improvement in guiding.

> > > Remove the central part of the guidscope's cover to stop down the

> > > aperture. I'm publishing this a little sooner than I had planned to

> and

> > > would like to conduct some further testing. But, so far, I'm seeing

> a

> > > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > > (pixels), using the same camera as you are. That equates to 1

> > > arc-second tracking.

> > >

> > > If nothing else, you will have established a consistent baseline for

> > > further testing.

> > >

> > > Will be interested in hearing of your progress.

> > >

> > > Regards,

> > >

> > > Bill Shaheen

> > > Gold Canyon, AZ

> > > USA

> > >

> >

>



----------------------------

#45663 Apr 24, 2010

Thanks Bill. I'm pretty confident of my mounts alignment, balance, etc. but

I will check the worm blocks. The guiding deteriorates as I move the scope

away from the meridian. I decided to visually observe the R.A. tracking

with a 9mm reticle eyepiece when off meridian. The star was quick to drift

east. When I corrected to the west, it began drifting west. When I then

corrected to the east, it continued drifting to the east. There was no

happy balance!?



Rick







From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

On Behalf Of Bill

Sent: Saturday, April 24, 2010 4:29 PM

To: Losmandy_users@yahoogroups.com

Subject: [Losmandy_users] Re: Ovision Upgrade













Hi, Rick -



As far as I'm concerned, there's no question the Ovision upgrade

improves the mount's performance, as illustrated by the graphs you can

see here:

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

ion%20testing/>

vision%20testing/

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

ion%20testing/>

Ovision%20testing/>



However, what I would suggest you do is first address any fundamental

tuning of the mount, such as checking the alignment of the worm blocks,

your RA backlash, balance, etc. Presumably you have the high precision

brass worm and it may just need "run-in" for awhile. You should also

train the mount's PEC.



Now, since you too have the Orion ST-80, there is one other improvement

that I'd like to suggest. I've been testing a simple modification for

the past couple days and so far I've seen an improvement in guiding.

Remove the central part of the guidscope's cover to stop down the

aperture. I'm publishing this a little sooner than I had planned to and

would like to conduct some further testing. But, so far, I'm seeing a

reduction in RMS values from the .24 - .30 range down to .16 - .21

(pixels), using the same camera as you are. That equates to 1

arc-second tracking.



If nothing else, you will have established a consistent baseline for

further testing.



Will be interested in hearing of your progress.



Regards,



Bill Shaheen

Gold Canyon, AZ

USA



--- In Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com> , "RickK" rickkaz@...> wrote: >

> Hi Guys,

> I purchased a new Losmandy G11 in late 2009. I am imaging with a

1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

Starshoot autoguider. I have not been happy with the R.A. accuracy of

the guiding and am thinking of purchasing the Ovision NS kit as an

upgrade. Would like to hear results other users may have had with this

conversion and whether the extra expense is worth it. Thanks. > Rick

>



[Non-text portions of this message have been removed]











[Non-text portions of this message have been removed]







----------------------------

#45664 Apr 24, 2010

I'm so glad to hear you observed your mount's behavior with an eyepiece.

That's a great way to know what's going on. In fact, I would only

suggest that before you perform the upgrade that you conduct several 16

minute (4 worm period) runs with guiding disabled and record your

current PE.



And, yes, get everything tightened up and aligned as well as you can so,

again, you have a repeatable baseline against which to compare after

installing the Ovision.



Best of luck,



Bill



--- In Losmandy_users@yahoogroups.com, "Rick Kazmierski" rickkaz@...>

wrote: >

> Thanks Bill. I'm pretty confident of my mounts alignment, balance,

etc. but > I will check the worm blocks. The guiding deteriorates as I move the

scope > away from the meridian. I decided to visually observe the R.A.

tracking > with a 9mm reticle eyepiece when off meridian. The star was quick to

drift > east. When I corrected to the west, it began drifting west. When I

then > corrected to the east, it continued drifting to the east. There was no

> happy balance!?

>

> Rick

>



----------------------------

#45666 Apr 24, 2010

ovision is designed to correct periodic error and types of periodic error specific to the Losmandy worm arrnagement.



You keep referring to tracking. Is your mount actually not tracking or are you saying tha there are periodic error jumps.



Mounts not tracking are: losing power, faulty connectors, reversed RA and Dec cables, accidentally set to southern hemisphere, and things like that.



The mount should track...



Greg N --- In Losmandy_users@yahoogroups.com, "Rick Kazmierski" rickkaz@...> wrote:

>

> Thanks Bill. I'm pretty confident of my mounts alignment, balance, etc. but

> I will check the worm blocks. The guiding deteriorates as I move the scope

> away from the meridian. I decided to visually observe the R.A. tracking

> with a 9mm reticle eyepiece when off meridian. The star was quick to drift

> east. When I corrected to the west, it began drifting west. When I then

> corrected to the east, it continued drifting to the east. There was no

> happy balance!?

>

> Rick

>

>

>

> From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> On Behalf Of Bill

> Sent: Saturday, April 24, 2010 4:29 PM

> To: Losmandy_users@yahoogroups.com

> Subject: [Losmandy_users] Re: Ovision Upgrade

>

>

>

>

>

>

> Hi, Rick -

>

> As far as I'm concerned, there's no question the Ovision upgrade

> improves the mount's performance, as illustrated by the graphs you can

> see here:

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> ion%20testing/>

> vision%20testing/

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> ion%20testing/>

> Ovision%20testing/>

>

> However, what I would suggest you do is first address any fundamental

> tuning of the mount, such as checking the alignment of the worm blocks,

> your RA backlash, balance, etc. Presumably you have the high precision

> brass worm and it may just need "run-in" for awhile. You should also

> train the mount's PEC.

>

> Now, since you too have the Orion ST-80, there is one other improvement

> that I'd like to suggest. I've been testing a simple modification for

> the past couple days and so far I've seen an improvement in guiding.

> Remove the central part of the guidscope's cover to stop down the

> aperture. I'm publishing this a little sooner than I had planned to and

> would like to conduct some further testing. But, so far, I'm seeing a

> reduction in RMS values from the .24 - .30 range down to .16 - .21

> (pixels), using the same camera as you are. That equates to 1

> arc-second tracking.

>

> If nothing else, you will have established a consistent baseline for

> further testing.

>

> Will be interested in hearing of your progress.

>

> Regards,

>

> Bill Shaheen

> Gold Canyon, AZ

> USA

>

> --- In Losmandy_users@yahoogroups.com

> mailto:Losmandy_users%40yahoogroups.com> , "RickK" rickkaz@> wrote:

> >

> > Hi Guys,

> > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> Starshoot autoguider. I have not been happy with the R.A. accuracy of

> the guiding and am thinking of purchasing the Ovision NS kit as an

> upgrade. Would like to hear results other users may have had with this

> conversion and whether the extra expense is worth it. Thanks.

> > Rick

> >

>

> [Non-text portions of this message have been removed]

>

>

>

>

>

> [Non-text portions of this message have been removed]

>







----------------------------

#45668 Apr 25, 2010

Hi Greg,

I Have the Ovision kit fitted to my G11 and the guiding is superb. I cannot believe how good the mount is now. The error rate has been cut in half and now I get less than 0.5 pixel correct whiles auto guiding.

I can get 5 minute exposure without guiding and still get round stars.

Vince

--- In Losmandy_users@yahoogroups.com, "gnowellsct" tim71pos@...> wrote:

>

> ovision is designed to correct periodic error and types of periodic error specific to the Losmandy worm arrnagement.

>

> You keep referring to tracking. Is your mount actually not tracking or are you saying tha there are periodic error jumps.

>

> Mounts not tracking are: losing power, faulty connectors, reversed RA and Dec cables, accidentally set to southern hemisphere, and things like that.

>

> The mount should track...

>

> Greg N

> --- In Losmandy_users@yahoogroups.com, "Rick Kazmierski" rickkaz@> wrote:

> >

> > Thanks Bill. I'm pretty confident of my mounts alignment, balance, etc. but

> > I will check the worm blocks. The guiding deteriorates as I move the scope

> > away from the meridian. I decided to visually observe the R.A. tracking

> > with a 9mm reticle eyepiece when off meridian. The star was quick to drift

> > east. When I corrected to the west, it began drifting west. When I then

> > corrected to the east, it continued drifting to the east. There was no

> > happy balance!?

> >

> > Rick

> >

> >

> >

> > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > On Behalf Of Bill

> > Sent: Saturday, April 24, 2010 4:29 PM

> > To: Losmandy_users@yahoogroups.com

> > Subject: [Losmandy_users] Re: Ovision Upgrade

> >

> >

> >

> >

> >

> >

> > Hi, Rick -

> >

> > As far as I'm concerned, there's no question the Ovision upgrade

> > improves the mount's performance, as illustrated by the graphs you can

> > see here:

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> > ion%20testing/>

> > vision%20testing/

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> > ion%20testing/>

> > Ovision%20testing/>

> >

> > However, what I would suggest you do is first address any fundamental

> > tuning of the mount, such as checking the alignment of the worm blocks,

> > your RA backlash, balance, etc. Presumably you have the high precision

> > brass worm and it may just need "run-in" for awhile. You should also

> > train the mount's PEC.

> >

> > Now, since you too have the Orion ST-80, there is one other improvement

> > that I'd like to suggest. I've been testing a simple modification for

> > the past couple days and so far I've seen an improvement in guiding.

> > Remove the central part of the guidscope's cover to stop down the

> > aperture. I'm publishing this a little sooner than I had planned to and

> > would like to conduct some further testing. But, so far, I'm seeing a

> > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > (pixels), using the same camera as you are. That equates to 1

> > arc-second tracking.

> >

> > If nothing else, you will have established a consistent baseline for

> > further testing.

> >

> > Will be interested in hearing of your progress.

> >

> > Regards,

> >

> > Bill Shaheen

> > Gold Canyon, AZ

> > USA

> >

> > --- In Losmandy_users@yahoogroups.com

> > mailto:Losmandy_users%40yahoogroups.com> , "RickK" rickkaz@> wrote:

> > >

> > > Hi Guys,

> > > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> > 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> > Starshoot autoguider. I have not been happy with the R.A. accuracy of

> > the guiding and am thinking of purchasing the Ovision NS kit as an

> > upgrade. Would like to hear results other users may have had with this

> > conversion and whether the extra expense is worth it. Thanks.

> > > Rick

> > >

> >

> > [Non-text portions of this message have been removed]

> >

> >

> >

> >

> >

> > [Non-text portions of this message have been removed]

> >

>



----------------------------

#45669 Apr 25, 2010

Guess I'm using the wrong terminology. I am referring to Periodic error,

not tracking.



Rick







From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

On Behalf Of gnowellsct

Sent: Saturday, April 24, 2010 11:36 PM

To: Losmandy_users@yahoogroups.com

Subject: [Losmandy_users] Re: Ovision Upgrade











ovision is designed to correct periodic error and types of periodic error

specific to the Losmandy worm arrnagement.



You keep referring to tracking. Is your mount actually not tracking or are

you saying tha there are periodic error jumps.



Mounts not tracking are: losing power, faulty connectors, reversed RA and

Dec cables, accidentally set to southern hemisphere, and things like that.



The mount should track...



Greg N

--- In Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com> , "Rick Kazmierski" rickkaz@...>

wrote: >

> Thanks Bill. I'm pretty confident of my mounts alignment, balance, etc.

but > I will check the worm blocks. The guiding deteriorates as I move the scope

> away from the meridian. I decided to visually observe the R.A. tracking

> with a 9mm reticle eyepiece when off meridian. The star was quick to drift

> east. When I corrected to the west, it began drifting west. When I then

> corrected to the east, it continued drifting to the east. There was no

> happy balance!?

>

> Rick

>

>

>

> From: Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com>

[mailto:Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com> ] > On Behalf Of Bill

> Sent: Saturday, April 24, 2010 4:29 PM

> To: Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com> > Subject: [Losmandy_users] Re: Ovision Upgrade

>

>

>

>

>

>

> Hi, Rick -

>

> As far as I'm concerned, there's no question the Ovision upgrade

> improves the mount's performance, as illustrated by the graphs you can

> see here:

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O> >

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis > ion%20testing/>

> vision%20testing/

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/> >

tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis > ion%20testing/>

> Ovision%20testing/>

>

> However, what I would suggest you do is first address any fundamental

> tuning of the mount, such as checking the alignment of the worm blocks,

> your RA backlash, balance, etc. Presumably you have the high precision

> brass worm and it may just need "run-in" for awhile. You should also

> train the mount's PEC.

>

> Now, since you too have the Orion ST-80, there is one other improvement

> that I'd like to suggest. I've been testing a simple modification for

> the past couple days and so far I've seen an improvement in guiding.

> Remove the central part of the guidscope's cover to stop down the

> aperture. I'm publishing this a little sooner than I had planned to and

> would like to conduct some further testing. But, so far, I'm seeing a

> reduction in RMS values from the .24 - .30 range down to .16 - .21

> (pixels), using the same camera as you are. That equates to 1

> arc-second tracking.

>

> If nothing else, you will have established a consistent baseline for

> further testing.

>

> Will be interested in hearing of your progress.

>

> Regards,

>

> Bill Shaheen

> Gold Canyon, AZ

> USA

>

> --- In Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com> > mailto:Losmandy_users%40yahoogroups.com> , "RickK" rickkaz@> wrote:

> >

> > Hi Guys,

> > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> Starshoot autoguider. I have not been happy with the R.A. accuracy of

> the guiding and am thinking of purchasing the Ovision NS kit as an

> upgrade. Would like to hear results other users may have had with this

> conversion and whether the extra expense is worth it. Thanks.

> > Rick

> >

>

> [Non-text portions of this message have been removed]

>

>

>

>

>

> [Non-text portions of this message have been removed]

>











[Non-text portions of this message have been removed]







----------------------------

#45670 Apr 25, 2010

Just a thought, Rick, but could you have been perhaps too well balanced?

I.e., with any amount of gap between the worm and worm wheel, the gears

could float, as it sounds from your description. What you will want

instead, as you may already know, is to slightly overweighted to the

east. Would like to just rule that out.



Bill





--- In Losmandy_users@yahoogroups.com, "Rick Kazmierski" rickkaz@...>

wrote: >

> Thanks Bill. I'm pretty confident of my mounts alignment, balance,

etc. but > I will check the worm blocks. The guiding deteriorates as I move the

scope > away from the meridian. I decided to visually observe the R.A.

tracking > with a 9mm reticle eyepiece when off meridian. The star was quick to

drift > east. When I corrected to the west, it began drifting west. When I

then > corrected to the east, it continued drifting to the east. There was no

> happy balance!?

>

> Rick

>



----------------------------

#45671 Apr 25, 2010

That makes a lot of sense. Looks like the weather may clear up tomorrow,

I'll give it a try. I'll check balance at the same time, but I don't

believe it's an issue.



Rick







From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

On Behalf Of Bill

Sent: Saturday, April 24, 2010 10:29 PM

To: Losmandy_users@yahoogroups.com

Subject: [Losmandy_users] Re: Ovision Upgrade













I'm so glad to hear you observed your mount's behavior with an eyepiece.

That's a great way to know what's going on. In fact, I would only

suggest that before you perform the upgrade that you conduct several 16

minute (4 worm period) runs with guiding disabled and record your

current PE.



And, yes, get everything tightened up and aligned as well as you can so,

again, you have a repeatable baseline against which to compare after

installing the Ovision.



Best of luck,



Bill



--- In Losmandy_users@yahoogroups.com

mailto:Losmandy_users%40yahoogroups.com> , "Rick Kazmierski" rickkaz@...>

wrote: >

> Thanks Bill. I'm pretty confident of my mounts alignment, balance,

etc. but > I will check the worm blocks. The guiding deteriorates as I move the

scope > away from the meridian. I decided to visually observe the R.A.

tracking > with a 9mm reticle eyepiece when off meridian. The star was quick to

drift > east. When I corrected to the west, it began drifting west. When I

then > corrected to the east, it continued drifting to the east. There was no

> happy balance!?

>

> Rick

>











[Non-text portions of this message have been removed]



----------------------------

#45675 Apr 25, 2010

It's been a such a long time some folks may be unaware that I was the first one into the pool on the commercialization of the Ovision. We have another group member who is even more of a pioneer, worked with Ovision on the development, but I'm sorry that I don't have his name at the tip of my fingers.



www.astromart.com/articles/article.asp?article_id=663



is the link.



Anyhow I just jumped in to Ovision not because I needed it but because I was tired of hearing the complaints about PE on this group. I actually had to get a friend to help me out with the imaging part. He was very impressed with the G11/Ovision.



Since that time, Floyd Blue did a LOT of work on further optimizing G11s.



Anyhow, if I ever do want to play around with a DSLR, my mount appears to be in good shape for the job.



regards

Greg N

--- In Losmandy_users@yahoogroups.com, "Vince" froggy.salfranc@...> wrote:

>

>

> Hi Greg,

> I Have the Ovision kit fitted to my G11 and the guiding is superb. I cannot believe how good the mount is now. The error rate has been cut in half and now I get less than 0.5 pixel correct whiles auto guiding.

> I can get 5 minute exposure without guiding and still get round stars.

> Vince

>

> --- In Losmandy_users@yahoogroups.com, "gnowellsct" tim71pos@> wrote:

> >

> > ovision is designed to correct periodic error and types of periodic error specific to the Losmandy worm arrnagement.

> >

> > You keep referring to tracking. Is your mount actually not tracking or are you saying tha there are periodic error jumps.

> >

> > Mounts not tracking are: losing power, faulty connectors, reversed RA and Dec cables, accidentally set to southern hemisphere, and things like that.

> >

> > The mount should track...

> >

> > Greg N

> > --- In Losmandy_users@yahoogroups.com, "Rick Kazmierski" rickkaz@> wrote:

> > >

> > > Thanks Bill. I'm pretty confident of my mounts alignment, balance, etc. but

> > > I will check the worm blocks. The guiding deteriorates as I move the scope

> > > away from the meridian. I decided to visually observe the R.A. tracking

> > > with a 9mm reticle eyepiece when off meridian. The star was quick to drift

> > > east. When I corrected to the west, it began drifting west. When I then

> > > corrected to the east, it continued drifting to the east. There was no

> > > happy balance!?

> > >

> > > Rick

> > >

> > >

> > >

> > > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > > On Behalf Of Bill

> > > Sent: Saturday, April 24, 2010 4:29 PM

> > > To: Losmandy_users@yahoogroups.com

> > > Subject: [Losmandy_users] Re: Ovision Upgrade

> > >

> > >

> > >

> > >

> > >

> > >

> > > Hi, Rick -

> > >

> > > As far as I'm concerned, there's no question the Ovision upgrade

> > > improves the mount's performance, as illustrated by the graphs you can

> > > see here:

> > > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> > > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> > > ion%20testing/>

> > > vision%20testing/

> > > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> > > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> > > ion%20testing/>

> > > Ovision%20testing/>

> > >

> > > However, what I would suggest you do is first address any fundamental

> > > tuning of the mount, such as checking the alignment of the worm blocks,

> > > your RA backlash, balance, etc. Presumably you have the high precision

> > > brass worm and it may just need "run-in" for awhile. You should also

> > > train the mount's PEC.

> > >

> > > Now, since you too have the Orion ST-80, there is one other improvement

> > > that I'd like to suggest. I've been testing a simple modification for

> > > the past couple days and so far I've seen an improvement in guiding.

> > > Remove the central part of the guidscope's cover to stop down the

> > > aperture. I'm publishing this a little sooner than I had planned to and

> > > would like to conduct some further testing. But, so far, I'm seeing a

> > > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > > (pixels), using the same camera as you are. That equates to 1

> > > arc-second tracking.

> > >

> > > If nothing else, you will have established a consistent baseline for

> > > further testing.

> > >

> > > Will be interested in hearing of your progress.

> > >

> > > Regards,

> > >

> > > Bill Shaheen

> > > Gold Canyon, AZ

> > > USA

> > >

> > > --- In Losmandy_users@yahoogroups.com

> > > mailto:Losmandy_users%40yahoogroups.com> , "RickK" rickkaz@> wrote:

> > > >

> > > > Hi Guys,

> > > > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> > > 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> > > Starshoot autoguider. I have not been happy with the R.A. accuracy of

> > > the guiding and am thinking of purchasing the Ovision NS kit as an

> > > upgrade. Would like to hear results other users may have had with this

> > > conversion and whether the extra expense is worth it. Thanks.

> > > > Rick

> > > >

> > >

> > > [Non-text portions of this message have been removed]

> > >

> > >

> > >

> > >

> > >

> > > [Non-text portions of this message have been removed]

> > >

> >

>







----------------------------

#45676 Apr 25, 2010

Well I'm not trying to nitpick, we actually do have people come on from time to time with tracking issues. PE is its own world.



As people here have mentioned there are things you can do/check to make sure your G11 is up to snuff even without Ovision. We have had reports of 5, 6 arc seconds peak to peak with new G11s lately. That's in the realm that Astro-Physics and Paramount guarantee.



But not all G11s do that, and many are used. It remains the case that Ovision is one of the most efficient options for dealing with several issues. One is periodic error, the other is, it makes adjusting the backlash easier, because you're dealing with one unit.



regards

Greg N

--- In Losmandy_users@yahoogroups.com, "Rick Kazmierski" rickkaz@...> wrote:

>

> Guess I'm using the wrong terminology. I am referring to Periodic error,

> not tracking.

>

> Rick

>

>

>

> From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> On Behalf Of gnowellsct

> Sent: Saturday, April 24, 2010 11:36 PM

> To: Losmandy_users@yahoogroups.com

> Subject: [Losmandy_users] Re: Ovision Upgrade

>

>

>

>

>

> ovision is designed to correct periodic error and types of periodic error

> specific to the Losmandy worm arrnagement.

>

> You keep referring to tracking. Is your mount actually not tracking or are

> you saying tha there are periodic error jumps.

>

> Mounts not tracking are: losing power, faulty connectors, reversed RA and

> Dec cables, accidentally set to southern hemisphere, and things like that.

>

> The mount should track...

>

> Greg N

> --- In Losmandy_users@yahoogroups.com

> mailto:Losmandy_users%40yahoogroups.com> , "Rick Kazmierski" rickkaz@>

> wrote:

> >

> > Thanks Bill. I'm pretty confident of my mounts alignment, balance, etc.

> but

> > I will check the worm blocks. The guiding deteriorates as I move the scope

> > away from the meridian. I decided to visually observe the R.A. tracking

> > with a 9mm reticle eyepiece when off meridian. The star was quick to drift

> > east. When I corrected to the west, it began drifting west. When I then

> > corrected to the east, it continued drifting to the east. There was no

> > happy balance!?

> >

> > Rick

> >

> >

> >

> > From: Losmandy_users@yahoogroups.com

> mailto:Losmandy_users%40yahoogroups.com>

> [mailto:Losmandy_users@yahoogroups.com

> mailto:Losmandy_users%40yahoogroups.com> ]

> > On Behalf Of Bill

> > Sent: Saturday, April 24, 2010 4:29 PM

> > To: Losmandy_users@yahoogroups.com

> mailto:Losmandy_users%40yahoogroups.com>

> > Subject: [Losmandy_users] Re: Ovision Upgrade

> >

> >

> >

> >

> >

> >

> > Hi, Rick -

> >

> > As far as I'm concerned, there's no question the Ovision upgrade

> > improves the mount's performance, as illustrated by the graphs you can

> > see here:

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O>

> >

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> > ion%20testing/>

> > vision%20testing/

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/>

> >

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/Ovis

> > ion%20testing/>

> > Ovision%20testing/>

> >

> > However, what I would suggest you do is first address any fundamental

> > tuning of the mount, such as checking the alignment of the worm blocks,

> > your RA backlash, balance, etc. Presumably you have the high precision

> > brass worm and it may just need "run-in" for awhile. You should also

> > train the mount's PEC.

> >

> > Now, since you too have the Orion ST-80, there is one other improvement

> > that I'd like to suggest. I've been testing a simple modification for

> > the past couple days and so far I've seen an improvement in guiding.

> > Remove the central part of the guidscope's cover to stop down the

> > aperture. I'm publishing this a little sooner than I had planned to and

> > would like to conduct some further testing. But, so far, I'm seeing a

> > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > (pixels), using the same camera as you are. That equates to 1

> > arc-second tracking.

> >

> > If nothing else, you will have established a consistent baseline for

> > further testing.

> >

> > Will be interested in hearing of your progress.

> >

> > Regards,

> >

> > Bill Shaheen

> > Gold Canyon, AZ

> > USA

> >

> > --- In Losmandy_users@yahoogroups.com

> mailto:Losmandy_users%40yahoogroups.com>

> > mailto:Losmandy_users%40yahoogroups.com> , "RickK" rickkaz@> wrote:

> > >

> > > Hi Guys,

> > > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> > 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> > Starshoot autoguider. I have not been happy with the R.A. accuracy of

> > the guiding and am thinking of purchasing the Ovision NS kit as an

> > upgrade. Would like to hear results other users may have had with this

> > conversion and whether the extra expense is worth it. Thanks.

> > > Rick

> > >

> >

> > [Non-text portions of this message have been removed]

> >

> >

> >

> >

> >

> > [Non-text portions of this message have been removed]

> >

>

>

>

>

>

> [Non-text portions of this message have been removed]

>







----------------------------

#45677 Apr 26, 2010

Hi,



I also would like to add my recent experience. I bought G11 (

non-gemini ) second hand in 2006. It was probably 3 years old that time. I

could not make use of it for photography even for small focal lengths (

300-400 mm ). As i used to get 2 major jerks in one worm period causing

elongated stars. It was not possible to guide them out.



When I tried adjusting worm-wheel mesh I could feel that there was

some problem with the worm bearing at one end of the worm. It was getting a

little stuck at 2 places. I tried to use DEC worm but it also had exactly

the same problem! So i decided to first try and change the bearings. I

bought new bearings for just 70 Rs ( ~ 2$ ) each. Removing old bearing was

a tricky task.



For past two days I am testing the mount with new bearings, the

results are really encouraging. Yesterday I could take 5 min sub at focal

length ~ 1400mm, guided at just 480mm focal length resulting in good round

stars. I am yet to check the PE with PemPro.

But star trails taken at this focal length do not show any jerks and are

much smoother than what it was before.

So it could be worth checking for faulty worm bearings before you go

for Ovision upgrade.



Regards,

Nilesh Desai

www.indussky.com





[Non-text portions of this message have been removed]



----------------------------

#45695 Apr 28, 2010

Bill,

On your PHD Guiding graph at the link you provided, is that with the Ovision upgrade or before it? If it is with the Ovision upgrade, do you have any PHD Guiding graphs from before the upgrade? Thanks.



Doug



--- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@...> wrote:

>

>

> Hi, Rick -

>

> As far as I'm concerned, there's no question the Ovision upgrade

> improves the mount's performance, as illustrated by the graphs you can

> see here:

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> vision%20testing/

> tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> Ovision%20testing/>

>

> However, what I would suggest you do is first address any fundamental

> tuning of the mount, such as checking the alignment of the worm blocks,

> your RA backlash, balance, etc. Presumably you have the high precision

> brass worm and it may just need "run-in" for awhile. You should also

> train the mount's PEC.

>

> Now, since you too have the Orion ST-80, there is one other improvement

> that I'd like to suggest. I've been testing a simple modification for

> the past couple days and so far I've seen an improvement in guiding.

> Remove the central part of the guidscope's cover to stop down the

> aperture. I'm publishing this a little sooner than I had planned to and

> would like to conduct some further testing. But, so far, I'm seeing a

> reduction in RMS values from the .24 - .30 range down to .16 - .21

> (pixels), using the same camera as you are. That equates to 1

> arc-second tracking.

>

> If nothing else, you will have established a consistent baseline for

> further testing.

>

> Will be interested in hearing of your progress.

>

> Regards,

>

> Bill Shaheen

> Gold Canyon, AZ

> USA

>

>

>

>

>

>

>

>

>

>

> --- In Losmandy_users@yahoogroups.com, "RickK" rickkaz@> wrote:

> >

> > Hi Guys,

> > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> Starshoot autoguider. I have not been happy with the R.A. accuracy of

> the guiding and am thinking of purchasing the Ovision NS kit as an

> upgrade. Would like to hear results other users may have had with this

> conversion and whether the extra expense is worth it. Thanks.

> > Rick

> >

>

>

>

>

> [Non-text portions of this message have been removed]

>



----------------------------

#45701 Apr 28, 2010

Doug -



The pics dated Sept, 23, 2008 were all prior to the upgrade. The one pic, "000109.jpg", dtd Oct. 6, 2008 was taken after the upgrade.

As indicated, "Graph after installing Ovision worm. RMS PE reduced from .51as to .35as.". Bear in mind, these were guided sessions.



Regards,



Bill

--- In Losmandy_users@yahoogroups.com, "sdholland777" sdholland777@...> wrote:

>

> Bill,

> On your PHD Guiding graph at the link you provided, is that with the Ovision upgrade or before it? If it is with the Ovision upgrade, do you have any PHD Guiding graphs from before the upgrade? Thanks.

>

> Doug

>

>

> --- In Losmandy_users@yahoogroups.com, "Bill" wjshaheen@> wrote:

> >

> >

> > Hi, Rick -

> >

> > As far as I'm concerned, there's no question the Ovision upgrade

> > improves the mount's performance, as illustrated by the graphs you can

> > see here:

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/O\

> > vision%20testing/

> > tech.groups.yahoo.com/group/Losmandy_users/files/Bill%20Shaheen/\

> > Ovision%20testing/>

> >

> > However, what I would suggest you do is first address any fundamental

> > tuning of the mount, such as checking the alignment of the worm blocks,

> > your RA backlash, balance, etc. Presumably you have the high precision

> > brass worm and it may just need "run-in" for awhile. You should also

> > train the mount's PEC.

> >

> > Now, since you too have the Orion ST-80, there is one other improvement

> > that I'd like to suggest. I've been testing a simple modification for

> > the past couple days and so far I've seen an improvement in guiding.

> > Remove the central part of the guidscope's cover to stop down the

> > aperture. I'm publishing this a little sooner than I had planned to and

> > would like to conduct some further testing. But, so far, I'm seeing a

> > reduction in RMS values from the .24 - .30 range down to .16 - .21

> > (pixels), using the same camera as you are. That equates to 1

> > arc-second tracking.

> >

> > If nothing else, you will have established a consistent baseline for

> > further testing.

> >

> > Will be interested in hearing of your progress.

> >

> > Regards,

> >

> > Bill Shaheen

> > Gold Canyon, AZ

> > USA

> >

> >

> >

> >

> >

> >

> >

> >

> >

> >

> > --- In Losmandy_users@yahoogroups.com, "RickK" rickkaz@> wrote:

> > >

> > > Hi Guys,

> > > I purchased a new Losmandy G11 in late 2009. I am imaging with a

> > 1600mm Cassegrain and guiding with an Orion 80mm Short Tube with the

> > Starshoot autoguider. I have not been happy with the R.A. accuracy of

> > the guiding and am thinking of purchasing the Ovision NS kit as an

> > upgrade. Would like to hear results other users may have had with this

> > conversion and whether the extra expense is worth it. Thanks.

> > > Rick

> > >

> >

> >

> >

> >

> > [Non-text portions of this message have been removed]

> >

>







----------------------------

#45725 May 2, 2010

Hello group

I am considereing the Ovision upgrade and have a stupid question... Do you do the upgrade on the RA and DEC or just the RA?



Thanks



Tony



----------------------------

#45726 May 2, 2010

The RA is the only one needed, DEC should do little if the polar alignment is good.

Floyd

--- In Losmandy_users@yahoogroups.com, "torzechowski" haoobservatory@...> wrote:

>

> Hello group

> I am considereing the Ovision upgrade and have a stupid question... Do you do the upgrade on the RA and DEC or just the RA?

>

> Thanks

>

> Tony

>



----------------------------

#48249 Mar 10, 2011

I recently took the plunge and installed the Ovision worm on my 4 year old G11. Just got tired of the guiding "anomolies".



With much trepeditation I followed the instructions carefully. To my surprise, it was simple and fast. The first time I fired it up to test out my guider it worked superbly.



I am extremely pleased with the result. My G11 guide performance is as good as any I've seen. The installation was easy. I'm sorry I waited so long. The cost is well worth it.



To anyone considering the upgrade, just do it. You won't be disappointed.



Dave



----------------------------

#48250 Mar 10, 2011

Dave, thanks for sharing!







I'm a bit new to this, so forgive the dumb question.







If you are guiding, then why do the PE matter? Do you shoot at high FL's or

very long exposures?







I've read a lot on the Ovision, etc, but still unclear if it would benefit

me.







Dave also







From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

On Behalf Of Dave

Sent: Thursday, March 10, 2011 4:14 PM

To: Losmandy_users@yahoogroups.com

Subject: [Losmandy_users] Ovision upgrade











I recently took the plunge and installed the Ovision worm on my 4 year old

G11. Just got tired of the guiding "anomolies".



With much trepeditation I followed the instructions carefully. To my

surprise, it was simple and fast. The first time I fired it up to test out

my guider it worked superbly.



I am extremely pleased with the result. My G11 guide performance is as good

as any I've seen. The installation was easy. I'm sorry I waited so long. The

cost is well worth it.



To anyone considering the upgrade, just do it. You won't be disappointed.



Dave











[Non-text portions of this message have been removed]



----------------------------

#48251 Mar 10, 2011

Dave - with mounts and guiding there are no dumb questions. I learned to do it by reading and watching what others do. I still have a ways to go.



I do a variety of shooting with long FL, short FL and wide angle. I can guide up to 6-7 minutes before getting saturated. I use Phd to guide and the new BackyardEOS for camera contol, focusing and drift alignment. It's great software and links very nicely to Phd.



With the graph in Phd I could see how inconsistently the mount was tracking. I have very good drift alignment but the worm gear made the graph look like a bouncing ball. The Ovision worm smoothed it out dramatically and eliminated the dreaded 76 second spike completely - which was quite pronounced with the Losmandy worm. I'm now trying to use PEC to smooth out a small blip at 4 minutes. A dire shortage of clear nights is hampering my ability to get er done.



In my estimation, the mount performance is now equivalent to some of the best on the market. I noticed a significant difference in the first shots after changing it out. If you want to guide with fewer problems to worry about, do the upgrade. Like I said, I should have done it long ago.



Dave

--- In Losmandy_users@yahoogroups.com, "Dave Wagner" djwhouse@...> wrote:

>

> Dave, thanks for sharing!

>

>

>

> I'm a bit new to this, so forgive the dumb question.

>

>

>

> If you are guiding, then why do the PE matter? Do you shoot at high FL's or

> very long exposures?

>

>

>

> I've read a lot on the Ovision, etc, but still unclear if it would benefit

> me.

>

>

>

> Dave also

>

>

>

> From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> On Behalf Of Dave

> Sent: Thursday, March 10, 2011 4:14 PM

> To: Losmandy_users@yahoogroups.com

> Subject: [Losmandy_users] Ovision upgrade

>

>

>

>

>

> I recently took the plunge and installed the Ovision worm on my 4 year old

> G11. Just got tired of the guiding "anomolies".

>

> With much trepeditation I followed the instructions carefully. To my

> surprise, it was simple and fast. The first time I fired it up to test out

> my guider it worked superbly.

>

> I am extremely pleased with the result. My G11 guide performance is as good

> as any I've seen. The installation was easy. I'm sorry I waited so long. The

> cost is well worth it.

>

> To anyone considering the upgrade, just do it. You won't be disappointed.

>

> Dave

>

>

>

>

>

> [Non-text portions of this message have been removed]

>







----------------------------

#48252 Mar 10, 2011

Hi Dave,



I'm convinced!



What was the wait time like to get the ovision worm once you ordered it?



Cheers,

Eric

On Mar 10, 2011, at 7:37 PM, "Dave" daverc11@...> wrote:



> Dave - with mounts and guiding there are no dumb questions. I learned to do it by reading and watching what others do. I still have a ways to go.

>

> I do a variety of shooting with long FL, short FL and wide angle. I can guide up to 6-7 minutes before getting saturated. I use Phd to guide and the new BackyardEOS for camera contol, focusing and drift alignment. It's great software and links very nicely to Phd.

>

> With the graph in Phd I could see how inconsistently the mount was tracking. I have very good drift alignment but the worm gear made the graph look like a bouncing ball. The Ovision worm smoothed it out dramatically and eliminated the dreaded 76 second spike completely - which was quite pronounced with the Losmandy worm. I'm now trying to use PEC to smooth out a small blip at 4 minutes. A dire shortage of clear nights is hampering my ability to get er done.

>

> In my estimation, the mount performance is now equivalent to some of the best on the market. I noticed a significant difference in the first shots after changing it out. If you want to guide with fewer problems to worry about, do the upgrade. Like I said, I should have done it long ago.

>

> Dave

>

> --- In Losmandy_users@yahoogroups.com, "Dave Wagner" djwhouse@...> wrote:

> >

> > Dave, thanks for sharing!

> >

> >

> >

> > I'm a bit new to this, so forgive the dumb question.

> >

> >

> >

> > If you are guiding, then why do the PE matter? Do you shoot at high FL's or

> > very long exposures?

> >

> >

> >

> > I've read a lot on the Ovision, etc, but still unclear if it would benefit

> > me.

> >

> >

> >

> > Dave also

> >

> >

> >

> > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > On Behalf Of Dave

> > Sent: Thursday, March 10, 2011 4:14 PM

> > To: Losmandy_users@yahoogroups.com

> > Subject: [Losmandy_users] Ovision upgrade

> >

> >

> >

> >

> >

> > I recently took the plunge and installed the Ovision worm on my 4 year old

> > G11. Just got tired of the guiding "anomolies".

> >

> > With much trepeditation I followed the instructions carefully. To my

> > surprise, it was simple and fast. The first time I fired it up to test out

> > my guider it worked superbly.

> >

> > I am extremely pleased with the result. My G11 guide performance is as good

> > as any I've seen. The installation was easy. I'm sorry I waited so long. The

> > cost is well worth it.

> >

> > To anyone considering the upgrade, just do it. You won't be disappointed.

> >

> > Dave

> >

> >

> >

> >

> >

> > [Non-text portions of this message have been removed]

> >

>

>





[Non-text portions of this message have been removed]



----------------------------

#48254 Mar 10, 2011

Dave



It was easy to order on-line. I had it within 10 days and Franck was very helpful - a good person to do business with.



Dave

--- In Losmandy_users@yahoogroups.com, Eric Le May roc.franche@...> wrote:

>

> Hi Dave,

>

> I'm convinced!

>

> What was the wait time like to get the ovision worm once you ordered it?

>

> Cheers,

> Eric

>

> On Mar 10, 2011, at 7:37 PM, "Dave" daverc11@...> wrote:

>

> > Dave - with mounts and guiding there are no dumb questions. I learned to do it by reading and watching what others do. I still have a ways to go.

> >

> > I do a variety of shooting with long FL, short FL and wide angle. I can guide up to 6-7 minutes before getting saturated. I use Phd to guide and the new BackyardEOS for camera contol, focusing and drift alignment. It's great software and links very nicely to Phd.

> >

> > With the graph in Phd I could see how inconsistently the mount was tracking. I have very good drift alignment but the worm gear made the graph look like a bouncing ball. The Ovision worm smoothed it out dramatically and eliminated the dreaded 76 second spike completely - which was quite pronounced with the Losmandy worm. I'm now trying to use PEC to smooth out a small blip at 4 minutes. A dire shortage of clear nights is hampering my ability to get er done.

> >

> > In my estimation, the mount performance is now equivalent to some of the best on the market. I noticed a significant difference in the first shots after changing it out. If you want to guide with fewer problems to worry about, do the upgrade. Like I said, I should have done it long ago.

> >

> > Dave

> >

> > --- In Losmandy_users@yahoogroups.com, "Dave Wagner" djwhouse@> wrote:

> > >

> > > Dave, thanks for sharing!

> > >

> > >

> > >

> > > I'm a bit new to this, so forgive the dumb question.

> > >

> > >

> > >

> > > If you are guiding, then why do the PE matter? Do you shoot at high FL's or

> > > very long exposures?

> > >

> > >

> > >

> > > I've read a lot on the Ovision, etc, but still unclear if it would benefit

> > > me.

> > >

> > >

> > >

> > > Dave also

> > >

> > >

> > >

> > > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > > On Behalf Of Dave

> > > Sent: Thursday, March 10, 2011 4:14 PM

> > > To: Losmandy_users@yahoogroups.com

> > > Subject: [Losmandy_users] Ovision upgrade

> > >

> > >

> > >

> > >

> > >

> > > I recently took the plunge and installed the Ovision worm on my 4 year old

> > > G11. Just got tired of the guiding "anomolies".

> > >

> > > With much trepeditation I followed the instructions carefully. To my

> > > surprise, it was simple and fast. The first time I fired it up to test out

> > > my guider it worked superbly.

> > >

> > > I am extremely pleased with the result. My G11 guide performance is as good

> > > as any I've seen. The installation was easy. I'm sorry I waited so long. The

> > > cost is well worth it.

> > >

> > > To anyone considering the upgrade, just do it. You won't be disappointed.

> > >

> > > Dave

> > >

> > >

> > >

> > >

> > >

> > > [Non-text portions of this message have been removed]

> > >

> >

> >

>

>

> [Non-text portions of this message have been removed]

>







----------------------------

#48269 Mar 12, 2011

I have opted of an ovision worm. I have tried faxing them, no reply and tried 2 emails. no reply. Are they in business and if so , how have you contacted them??

chuck

--- In Losmandy_users@yahoogroups.com, "Dave" daverc11@...> wrote:

>

> Dave

>

> It was easy to order on-line. I had it within 10 days and Franck was very helpful - a good person to do business with.

>

> Dave

>

> --- In Losmandy_users@yahoogroups.com, Eric Le May roc.franche@> wrote:

> >

> > Hi Dave,

> >

> > I'm convinced!

> >

> > What was the wait time like to get the ovision worm once you ordered it?

> >

> > Cheers,

> > Eric

> >

> > On Mar 10, 2011, at 7:37 PM, "Dave" daverc11@> wrote:

> >

> > > Dave - with mounts and guiding there are no dumb questions. I learned to do it by reading and watching what others do. I still have a ways to go.

> > >

> > > I do a variety of shooting with long FL, short FL and wide angle. I can guide up to 6-7 minutes before getting saturated. I use Phd to guide and the new BackyardEOS for camera contol, focusing and drift alignment. It's great software and links very nicely to Phd.

> > >

> > > With the graph in Phd I could see how inconsistently the mount was tracking. I have very good drift alignment but the worm gear made the graph look like a bouncing ball. The Ovision worm smoothed it out dramatically and eliminated the dreaded 76 second spike completely - which was quite pronounced with the Losmandy worm. I'm now trying to use PEC to smooth out a small blip at 4 minutes. A dire shortage of clear nights is hampering my ability to get er done.

> > >

> > > In my estimation, the mount performance is now equivalent to some of the best on the market. I noticed a significant difference in the first shots after changing it out. If you want to guide with fewer problems to worry about, do the upgrade. Like I said, I should have done it long ago.

> > >

> > > Dave

> > >

> > > --- In Losmandy_users@yahoogroups.com, "Dave Wagner" djwhouse@> wrote:

> > > >

> > > > Dave, thanks for sharing!

> > > >

> > > >

> > > >

> > > > I'm a bit new to this, so forgive the dumb question.

> > > >

> > > >

> > > >

> > > > If you are guiding, then why do the PE matter? Do you shoot at high FL's or

> > > > very long exposures?

> > > >

> > > >

> > > >

> > > > I've read a lot on the Ovision, etc, but still unclear if it would benefit

> > > > me.

> > > >

> > > >

> > > >

> > > > Dave also

> > > >

> > > >

> > > >

> > > > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > > > On Behalf Of Dave

> > > > Sent: Thursday, March 10, 2011 4:14 PM

> > > > To: Losmandy_users@yahoogroups.com

> > > > Subject: [Losmandy_users] Ovision upgrade

> > > >

> > > >

> > > >

> > > >

> > > >

> > > > I recently took the plunge and installed the Ovision worm on my 4 year old

> > > > G11. Just got tired of the guiding "anomolies".

> > > >

> > > > With much trepeditation I followed the instructions carefully. To my

> > > > surprise, it was simple and fast. The first time I fired it up to test out

> > > > my guider it worked superbly.

> > > >

> > > > I am extremely pleased with the result. My G11 guide performance is as good

> > > > as any I've seen. The installation was easy. I'm sorry I waited so long. The

> > > > cost is well worth it.

> > > >

> > > > To anyone considering the upgrade, just do it. You won't be disappointed.

> > > >

> > > > Dave

> > > >

> > > >

> > > >

> > > >

> > > >

> > > > [Non-text portions of this message have been removed]

> > > >

> > >

> > >

> >

> >

> > [Non-text portions of this message have been removed]

> >

>



----------------------------

#48270 Mar 13, 2011

We occasionally see complaints like this. (Also about Losmandy!) It's a small shop and Franck participates among other things in Antarctic research (summer there now) so it might just be the usual small shop delays. He also goes out to star parties. And then there's the usual visiting relatives and other things that small shop people do which slow down their operations.



I grant you that it is annoying. Their web site is still up: unlikely they'd be paying for that if they were out of business. Same thing with the fax. You can try calling them. Sometimes a small shop gets so busy they have a hard time keeping up with this week's sales and then the sales two or three weeks out take some time to get around to. Also I think the worms get made in batches (and then individually tested) so if they're between batches they might delay answering till they know more.



All of which is to say, yes, it is inconvenient, and if they need a few weeks you'd think they'd answer anyhow, but eventually you should get through.



Greg N

--- In Losmandy_users@yahoogroups.com, jacobsonc@... wrote:

>

> I have opted of an ovision worm. I have tried faxing them, no reply and tried 2 emails. no reply. Are they in business and if so , how have you contacted them??

> chuck

>

> --- In Losmandy_users@yahoogroups.com, "Dave" daverc11@> wrote:

> >

> > Dave

> >

> > It was easy to order on-line. I had it within 10 days and Franck was very helpful - a good person to do business with.

> >

> > Dave

> >

> > --- In Losmandy_users@yahoogroups.com, Eric Le May roc.franche@> wrote:

> > >

> > > Hi Dave,

> > >

> > > I'm convinced!

> > >

> > > What was the wait time like to get the ovision worm once you ordered it?

> > >

> > > Cheers,

> > > Eric

> > >

> > > On Mar 10, 2011, at 7:37 PM, "Dave" daverc11@> wrote:

> > >

> > > > Dave - with mounts and guiding there are no dumb questions. I learned to do it by reading and watching what others do. I still have a ways to go.

> > > >

> > > > I do a variety of shooting with long FL, short FL and wide angle. I can guide up to 6-7 minutes before getting saturated. I use Phd to guide and the new BackyardEOS for camera contol, focusing and drift alignment. It's great software and links very nicely to Phd.

> > > >

> > > > With the graph in Phd I could see how inconsistently the mount was tracking. I have very good drift alignment but the worm gear made the graph look like a bouncing ball. The Ovision worm smoothed it out dramatically and eliminated the dreaded 76 second spike completely - which was quite pronounced with the Losmandy worm. I'm now trying to use PEC to smooth out a small blip at 4 minutes. A dire shortage of clear nights is hampering my ability to get er done.

> > > >

> > > > In my estimation, the mount performance is now equivalent to some of the best on the market. I noticed a significant difference in the first shots after changing it out. If you want to guide with fewer problems to worry about, do the upgrade. Like I said, I should have done it long ago.

> > > >

> > > > Dave

> > > >

> > > > --- In Losmandy_users@yahoogroups.com, "Dave Wagner" djwhouse@> wrote:

> > > > >

> > > > > Dave, thanks for sharing!

> > > > >

> > > > >

> > > > >

> > > > > I'm a bit new to this, so forgive the dumb question.

> > > > >

> > > > >

> > > > >

> > > > > If you are guiding, then why do the PE matter? Do you shoot at high FL's or

> > > > > very long exposures?

> > > > >

> > > > >

> > > > >

> > > > > I've read a lot on the Ovision, etc, but still unclear if it would benefit

> > > > > me.

> > > > >

> > > > >

> > > > >

> > > > > Dave also

> > > > >

> > > > >

> > > > >

> > > > > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > > > > On Behalf Of Dave

> > > > > Sent: Thursday, March 10, 2011 4:14 PM

> > > > > To: Losmandy_users@yahoogroups.com

> > > > > Subject: [Losmandy_users] Ovision upgrade

> > > > >

> > > > >

> > > > >

> > > > >

> > > > >

> > > > > I recently took the plunge and installed the Ovision worm on my 4 year old

> > > > > G11. Just got tired of the guiding "anomolies".

> > > > >

> > > > > With much trepeditation I followed the instructions carefully. To my

> > > > > surprise, it was simple and fast. The first time I fired it up to test out

> > > > > my guider it worked superbly.

> > > > >

> > > > > I am extremely pleased with the result. My G11 guide performance is as good

> > > > > as any I've seen. The installation was easy. I'm sorry I waited so long. The

> > > > > cost is well worth it.

> > > > >

> > > > > To anyone considering the upgrade, just do it. You won't be disappointed.

> > > > >

> > > > > Dave

> > > > >

> > > > >

> > > > >

> > > > >

> > > > >

> > > > > [Non-text portions of this message have been removed]

> > > > >

> > > >

> > > >

> > >

> > >

> > > [Non-text portions of this message have been removed]

> > >

> >

>







----------------------------

#48272 Mar 13, 2011

I emailed them a question regarding my Ovision, and got a reply in less than 6 hours. That was Thursday or so.



Alex



--- In Losmandy_users@yahoogroups.com, jacobsonc@... wrote:

>

> I have opted of an ovision worm. I have tried faxing them, no reply and tried 2 emails. no reply. Are they in business and if so , how have you contacted them??

> chuck

>

> --- In Losmandy_users@yahoogroups.com, "Dave" daverc11@> wrote:

> >

> > Dave

> >

> > It was easy to order on-line. I had it within 10 days and Franck was very helpful - a good person to do business with.

> >

> > Dave

> >

> > --- In Losmandy_users@yahoogroups.com, Eric Le May roc.franche@> wrote:

> > >

> > > Hi Dave,

> > >

> > > I'm convinced!

> > >

> > > What was the wait time like to get the ovision worm once you ordered it?

> > >

> > > Cheers,

> > > Eric

> > >

> > > On Mar 10, 2011, at 7:37 PM, "Dave" daverc11@> wrote:

> > >

> > > > Dave - with mounts and guiding there are no dumb questions. I learned to do it by reading and watching what others do. I still have a ways to go.

> > > >

> > > > I do a variety of shooting with long FL, short FL and wide angle. I can guide up to 6-7 minutes before getting saturated. I use Phd to guide and the new BackyardEOS for camera contol, focusing and drift alignment. It's great software and links very nicely to Phd.

> > > >

> > > > With the graph in Phd I could see how inconsistently the mount was tracking. I have very good drift alignment but the worm gear made the graph look like a bouncing ball. The Ovision worm smoothed it out dramatically and eliminated the dreaded 76 second spike completely - which was quite pronounced with the Losmandy worm. I'm now trying to use PEC to smooth out a small blip at 4 minutes. A dire shortage of clear nights is hampering my ability to get er done.

> > > >

> > > > In my estimation, the mount performance is now equivalent to some of the best on the market. I noticed a significant difference in the first shots after changing it out. If you want to guide with fewer problems to worry about, do the upgrade. Like I said, I should have done it long ago.

> > > >

> > > > Dave

> > > >

> > > > --- In Losmandy_users@yahoogroups.com, "Dave Wagner" djwhouse@> wrote:

> > > > >

> > > > > Dave, thanks for sharing!

> > > > >

> > > > >

> > > > >

> > > > > I'm a bit new to this, so forgive the dumb question.

> > > > >

> > > > >

> > > > >

> > > > > If you are guiding, then why do the PE matter? Do you shoot at high FL's or

> > > > > very long exposures?

> > > > >

> > > > >

> > > > >

> > > > > I've read a lot on the Ovision, etc, but still unclear if it would benefit

> > > > > me.

> > > > >

> > > > >

> > > > >

> > > > > Dave also

> > > > >

> > > > >

> > > > >

> > > > > From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com]

> > > > > On Behalf Of Dave

> > > > > Sent: Thursday, March 10, 2011 4:14 PM

> > > > > To: Losmandy_users@yahoogroups.com

> > > > > Subject: [Losmandy_users] Ovision upgrade

> > > > >

> > > > >

> > > > >

> > > > >

> > > > >

> > > > > I recently took the plunge and installed the Ovision worm on my 4 year old

> > > > > G11. Just got tired of the guiding "anomolies".

> > > > >

> > > > > With much trepeditation I followed the instructions carefully. To my

> > > > > surprise, it was simple and fast. The first time I fired it up to test out

> > > > > my guider it worked superbly.

> > > > >

> > > > > I am extremely pleased with the result. My G11 guide performance is as good

> > > > > as any I've seen. The installation was easy. I'm sorry I waited so long. The

> > > > > cost is well worth it.

> > > > >

> > > > > To anyone considering the upgrade, just do it. You won't be disappointed.

> > > > >

> > > > > Dave

> > > > >

> > > > >

> > > > >

> > > > >

> > > > >

> > > > > [Non-text portions of this message have been removed]

> > > > >

> > > >

> > > >

> > >

> > >

> > > [Non-text portions of this message have been removed]

> > >

> >

>



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