VintageBigBlue.org

 

Re: PauloadLosmandyG11


Dec 17, 2009

 


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

#44539 Dec 17, 2009

Joe, Steve,



The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

Luis



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

#44541 Dec 17, 2009

Gemini seems to run best from 18 volt input, some use 16v.



The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.



Oz

--- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@...> wrote:

>

> Joe, Steve,

>

> The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> Luis

>



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

#44542 Dec 17, 2009

According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

Floyd

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

>

> Gemini seems to run best from 18 volt input, some use 16v.

>

> The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

>

> Oz

>

> --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> >

> > Joe, Steve,

> >

> > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > Luis

> >

>



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

#44544 Dec 17, 2009

I'm not sure where that 50% number comes from either. You hear it from

time to time.



What works for one person may not work for another person. What is the

focal length and pixel size of the camera? Are you doing science or

pretty pictures? Makes a big difference on what you can do and still

get an acceptable result.



Jim



bakersfieldbiker wrote: > According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> Floyd

>

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

>

>> Gemini seems to run best from 18 volt input, some use 16v.

>>

>> The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

>>

>> Oz

>>

>> --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

>>

>>> Joe, Steve,

>>>

>>> The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

>>> Luis

>>>

>>>

>

>

>

>

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

>

> Yahoo! Groups Links

>

>

>

>

>



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

#44549 Dec 17, 2009

Floyd,

What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

Steve ----- Original Message -----

From: bakersfieldbiker

To: Losmandy_users@yahoogroups.com

Sent: Thursday, December 17, 2009 9:39 AM

Subject: [Losmandy_users] Re: PauloadLosmandyG11







According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

Floyd



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

>

> Gemini seems to run best from 18 volt input, some use 16v.

>

> The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

>

> Oz

>

> --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> >

> > Joe, Steve,

> >

> > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > Luis

> >

>











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



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

#44552 Dec 17, 2009

Hi Steve,

The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.



Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.



Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

Floyd



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

>

> Floyd,

> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> Steve

> ----- Original Message -----

> From: bakersfieldbiker

> To: Losmandy_users@yahoogroups.com

> Sent: Thursday, December 17, 2009 9:39 AM

> Subject: [Losmandy_users] Re: PauloadLosmandyG11

>

>

>

> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> Floyd

>

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

> >

> > Gemini seems to run best from 18 volt input, some use 16v.

> >

> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> >

> > Oz

> >

> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> > >

> > > Joe, Steve,

> > >

> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > > Luis

> > >

> >

>

>

>

>

>

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

>







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

#44553 Dec 17, 2009

Hi Floyd,



I had been thinking of using the 9.25 for asteroid occultation work, where guiding is not as big an issue, but the mount still had problems with accurate gotos with that scope. I don't know what a maximum reasonable focal length is for the GM-8, it depends on so many factors, but even with a .63 focal reducer the focal length of the 9.25 is 1480 mm. That's probably not too practical for the GM-8. I have a Meade 8 inch SCT which to me is marginally ok for just about anything you would want to do. Even after ripping off the Meade label I am not real enthusiastic about it, so I don't like to use it very much either..



I really hate to give up the 9.25, but I have been thinking about selling it and using the money to get one of the new Celestron 8 inch Edge SCTs. Supposedly less coma, brighter images, and no mirror flop, plus its fastar capable.. With a focal reducer I could get it down to more reasonable focal length for imaging on the GM-8. Also, the video camera I use for occultation is no bigger around than the secondary and its instructions say the optimal focal ratio is F 1.2. I suppose its possible to do video in a fastar configuration, and if so it would probably be almost as effective at gathering light as the 9.25. Anyway I am going to put off a final decision until I actually see one of the Edge SCTs. I have not made it down to Southern California to do any imaging yet, maybe early next year.



best wishes for a merry Christmas,

Steve Bull

----- Original Message -----

From: bakersfieldbiker

To: Losmandy_users@yahoogroups.com

Sent: Thursday, December 17, 2009 2:18 PM

Subject: [Losmandy_users] Re: PauloadLosmandyG11







Hi Steve,

The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.



Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.



Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

Floyd





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

>

> Floyd,

> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> Steve

> ----- Original Message -----

> From: bakersfieldbiker

> To: Losmandy_users@yahoogroups.com

> Sent: Thursday, December 17, 2009 9:39 AM

> Subject: [Losmandy_users] Re: PauloadLosmandyG11

>

>

>

> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> Floyd

>

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

> >

> > Gemini seems to run best from 18 volt input, some use 16v.

> >

> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> >

> > Oz

> >

> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> > >

> > > Joe, Steve,

> > >

> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > > Luis

> > >

> >

>

>

>

>

>

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

>











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



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

#44554 Dec 17, 2009

Hi Steve,

I assume that it is well balances, with the proper bias to East and in DEC. So with that assumed, then I would think that the weight and focal length are probably making things tough on the mount.

Have you ever had a chance to try the GM-8 on a pier or different tripod? This might make things a bit better. Maybe you could get a chance to try this?

A lighter weight scope with a shorter focal length would probably be better for the GM-8. But still, a more solid base could be the answer too.



Floyd

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

>

> Hi Floyd,

>

> I had been thinking of using the 9.25 for asteroid occultation work, where guiding is not as big an issue, but the mount still had problems with accurate gotos with that scope. I don't know what a maximum reasonable focal length is for the GM-8, it depends on so many factors, but even with a .63 focal reducer the focal length of the 9.25 is 1480 mm. That's probably not too practical for the GM-8. I have a Meade 8 inch SCT which to me is marginally ok for just about anything you would want to do. Even after ripping off the Meade label I am not real enthusiastic about it, so I don't like to use it very much either..

>

> I really hate to give up the 9.25, but I have been thinking about selling it and using the money to get one of the new Celestron 8 inch Edge SCTs. Supposedly less coma, brighter images, and no mirror flop, plus its fastar capable.. With a focal reducer I could get it down to more reasonable focal length for imaging on the GM-8. Also, the video camera I use for occultation is no bigger around than the secondary and its instructions say the optimal focal ratio is F 1.2. I suppose its possible to do video in a fastar configuration, and if so it would probably be almost as effective at gathering light as the 9.25. Anyway I am going to put off a final decision until I actually see one of the Edge SCTs. I have not made it down to Southern California to do any imaging yet, maybe early next year.

>

> best wishes for a merry Christmas,

> Steve Bull

>

> ----- Original Message -----

> From: bakersfieldbiker

> To: Losmandy_users@yahoogroups.com

> Sent: Thursday, December 17, 2009 2:18 PM

> Subject: [Losmandy_users] Re: PauloadLosmandyG11

>

>

>

> Hi Steve,

> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

>

> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

>

> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

> Floyd

>

>

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

> >

> > Floyd,

> > What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> > Steve

> > ----- Original Message -----

> > From: bakersfieldbiker

> > To: Losmandy_users@yahoogroups.com

> > Sent: Thursday, December 17, 2009 9:39 AM

> > Subject: [Losmandy_users] Re: PauloadLosmandyG11

> >

> >

> >

> > According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> > Floyd

> >

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

> > >

> > > Gemini seems to run best from 18 volt input, some use 16v.

> > >

> > > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> > >

> > > Oz

> > >

> > > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> > > >

> > > > Joe, Steve,

> > > >

> > > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > > > Luis

> > > >

> > >

> >

> >

> >

> >

> >

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

> >

>

>

>

>

>

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

>







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

#44576 Dec 22, 2009

I believe you are incorrect. The recommended payload for visual on a G11 is 60lb and 30lb for imaging. Stands to reason the same applies to the GM-8. The rated capacity is 30lbs for visual and obviously something less for imaging.

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

>

> Hi Steve,

> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

>

> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

>

> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

> Floyd

>

>

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

> >

> > Floyd,

> > What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> > Steve

> > ----- Original Message -----

> > From: bakersfieldbiker

> > To: Losmandy_users@yahoogroups.com

> > Sent: Thursday, December 17, 2009 9:39 AM

> > Subject: [Losmandy_users] Re: PauloadLosmandyG11

> >

> >

> >

> > According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> > Floyd

> >

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

> > >

> > > Gemini seems to run best from 18 volt input, some use 16v.

> > >

> > > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> > >

> > > Oz

> > >

> > > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> > > >

> > > > Joe, Steve,

> > > >

> > > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > > > Luis

> > > >

> > >

> >

> >

> >

> >

> >

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

> >

>



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

#44578 Dec 22, 2009

And later under specifications it says "Instrument weight capacity 60 lbs."



Jim



bakersfieldbiker wrote: > Hi,

> Can you point me to the ratings that you are stating? I did not see this listed on the Losmandy site, this is what they state.

> G-11

> EQUATORIAL MOUNT

> 60 lb. INSTRUMENT CAPACITY

> 100 lb. TOTAL CAPACITY

> Floyd

>

> --- In Losmandy_users@yahoogroups.com, "Shaft" mlhg0001@...> wrote:

>

>> I believe you are incorrect. The recommended payload for visual on a G11 is 60lb and 30lb for imaging. Stands to reason the same applies to the GM-8. The rated capacity is 30lbs for visual and obviously something less for imaging.

>>

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

>>

>>> Hi Steve,

>>> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

>>>

>>> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

>>>

>>> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

>>> Floyd

>>>

>>>

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

>>>

>>>> Floyd,

>>>> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

>>>> Steve

>>>> ----- Original Message -----

>>>> From: bakersfieldbiker

>>>> To: Losmandy_users@yahoogroups.com

>>>> Sent: Thursday, December 17, 2009 9:39 AM

>>>> Subject: [Losmandy_users] Re: PauloadLosmandyG11

>>>>

>>>>

>>>>

>>>> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

>>>> Floyd

>>>>

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

>>>> >

>>>> > Gemini seems to run best from 18 volt input, some use 16v.

>>>> >

>>>> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

>>>> >

>>>> > Oz

>>>> >

>>>> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

>>>> > >

>>>> > > Joe, Steve,

>>>> > >

>>>> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

>>>> > > Luis

>>>> > >

>>>> >

>>>>

>>>>

>>>>

>>>>

>>>>

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

>>>>

>>>>

>

>

>

>

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

>

> Yahoo! Groups Links

>

>

>

>

>







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

#44580 Dec 23, 2009

I have read and have herd from my AP club that AP is half of visual for all mounts (even AstroPhysics mounts) except Tak, were the Tak is under rated.



cheers!

Oz

--- In Losmandy_users@yahoogroups.com, Jim Jones albiero@...> wrote:

>

> And later under specifications it says "Instrument weight capacity 60 lbs."

>

> Jim

>

> bakersfieldbiker wrote:

> > Hi,

> > Can you point me to the ratings that you are stating? I did not see this listed on the Losmandy site, this is what they state.

> > G-11

> > EQUATORIAL MOUNT

> > 60 lb. INSTRUMENT CAPACITY

> > 100 lb. TOTAL CAPACITY

> > Floyd

> >

> > --- In Losmandy_users@yahoogroups.com, "Shaft" mlhg0001@> wrote:

> >

> >> I believe you are incorrect. The recommended payload for visual on a G11 is 60lb and 30lb for imaging. Stands to reason the same applies to the GM-8. The rated capacity is 30lbs for visual and obviously something less for imaging.

> >>

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

> >>

> >>> Hi Steve,

> >>> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

> >>>

> >>> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

> >>>

> >>> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

> >>> Floyd

> >>>

> >>>

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

> >>>

> >>>> Floyd,

> >>>> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> >>>> Steve

> >>>> ----- Original Message -----

> >>>> From: bakersfieldbiker

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

> >>>> Sent: Thursday, December 17, 2009 9:39 AM

> >>>> Subject: [Losmandy_users] Re: PauloadLosmandyG11

> >>>>

> >>>>

> >>>>

> >>>> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> >>>> Floyd

> >>>>

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

> >>>> >

> >>>> > Gemini seems to run best from 18 volt input, some use 16v.

> >>>> >

> >>>> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> >>>> >

> >>>> > Oz

> >>>> >

> >>>> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> >>>> > >

> >>>> > > Joe, Steve,

> >>>> > >

> >>>> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> >>>> > > Luis

> >>>> > >

> >>>> >

> >>>>

> >>>>

> >>>>

> >>>>

> >>>>

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

> >>>>

> >>>>

> >

> >

> >

> >

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

> >

> > Yahoo! Groups Links

> >

> >

> >

> >

> >

>



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

#44582 Dec 23, 2009

Hi Oz,

Unfortunately, general statements are generally misleading. :^)



I have talked with Scott on this and the ratings are for what ever, photo or visual acording to him. Some mounts would give 90-120 lbs for the G-11 if they made it (then they would say 50% for photo), just look at some of the mounts that are rated for 60-70 lbs.



There are quite a few of us that are loading well beyond 30 lbs. I have seen 65 lbs used for photo with the G-11, which is probably not the best, but it seemed to work fine.

Floyd

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

>

> I have read and have herd from my AP club that AP is half of visual for all mounts (even AstroPhysics mounts) except Tak, were the Tak is under rated.

>

> cheers!

> Oz

>

> --- In Losmandy_users@yahoogroups.com, Jim Jones albiero@> wrote:

> >

> > And later under specifications it says "Instrument weight capacity 60 lbs."

> >

> > Jim

> >

> > bakersfieldbiker wrote:

> > > Hi,

> > > Can you point me to the ratings that you are stating? I did not see this listed on the Losmandy site, this is what they state.

> > > G-11

> > > EQUATORIAL MOUNT

> > > 60 lb. INSTRUMENT CAPACITY

> > > 100 lb. TOTAL CAPACITY

> > > Floyd

> > >

> > > --- In Losmandy_users@yahoogroups.com, "Shaft" mlhg0001@> wrote:

> > >

> > >> I believe you are incorrect. The recommended payload for visual on a G11 is 60lb and 30lb for imaging. Stands to reason the same applies to the GM-8. The rated capacity is 30lbs for visual and obviously something less for imaging.

> > >>

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

> > >>

> > >>> Hi Steve,

> > >>> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

> > >>>

> > >>> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

> > >>>

> > >>> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

> > >>> Floyd

> > >>>

> > >>>

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

> > >>>

> > >>>> Floyd,

> > >>>> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> > >>>> Steve

> > >>>> ----- Original Message -----

> > >>>> From: bakersfieldbiker

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

> > >>>> Sent: Thursday, December 17, 2009 9:39 AM

> > >>>> Subject: [Losmandy_users] Re: PauloadLosmandyG11

> > >>>>

> > >>>>

> > >>>>

> > >>>> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> > >>>> Floyd

> > >>>>

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

> > >>>> >

> > >>>> > Gemini seems to run best from 18 volt input, some use 16v.

> > >>>> >

> > >>>> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> > >>>> >

> > >>>> > Oz

> > >>>> >

> > >>>> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> > >>>> > >

> > >>>> > > Joe, Steve,

> > >>>> > >

> > >>>> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > >>>> > > Luis

> > >>>> > >

> > >>>> >

> > >>>>

> > >>>>

> > >>>>

> > >>>>

> > >>>>

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

> > >>>>

> > >>>>

> > >

> > >

> > >

> > >

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

> > >

> > > Yahoo! Groups Links

> > >

> > >

> > >

> > >

> > >

> >

>







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

#44584 Dec 23, 2009

I have been imaging with my GM-8 with a 20 lb load. I get nice tight round stars with good guiding, and the mount performs quite nicely at that weight. Tracking, slewing, and gotos are smooth and accurate, but on the other hand, I am imaging at a focal length of only 654 mm. I don't think weight alone is the whole story. The mount had problems carrying a Celestron 9.25 SCT. The total weight was probably about 24 lbs, but that scope is relatively long and heavy at both ends so inertia was more of a problem. Bottom line, its not just the weight of the load, its also the type of load, and what you want to do. ----- Original Message -----

From: wforacer.rm

To: Losmandy_users@yahoogroups.com

Sent: Wednesday, December 23, 2009 9:38 AM

Subject: [Losmandy_users] Re: PauloadLosmandyG11







I have read and have herd from my AP club that AP is half of visual for all mounts (even AstroPhysics mounts) except Tak, were the Tak is under rated.



cheers!

Oz



--- In Losmandy_users@yahoogroups.com, Jim Jones albiero@...> wrote:

>

> And later under specifications it says "Instrument weight capacity 60 lbs."

>

> Jim

>

> bakersfieldbiker wrote:

> > Hi,

> > Can you point me to the ratings that you are stating? I did not see this listed on the Losmandy site, this is what they state.

> > G-11

> > EQUATORIAL MOUNT

> > 60 lb. INSTRUMENT CAPACITY

> > 100 lb. TOTAL CAPACITY

> > Floyd

> >

> > --- In Losmandy_users@yahoogroups.com, "Shaft" mlhg0001@> wrote:

> >

> >> I believe you are incorrect. The recommended payload for visual on a G11 is 60lb and 30lb for imaging. Stands to reason the same applies to the GM-8. The rated capacity is 30lbs for visual and obviously something less for imaging.

> >>

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

> >>

> >>> Hi Steve,

> >>> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

> >>>

> >>> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

> >>>

> >>> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

> >>> Floyd

> >>>

> >>>

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

> >>>

> >>>> Floyd,

> >>>> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> >>>> Steve

> >>>> ----- Original Message -----

> >>>> From: bakersfieldbiker

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

> >>>> Sent: Thursday, December 17, 2009 9:39 AM

> >>>> Subject: [Losmandy_users] Re: PauloadLosmandyG11

> >>>>

> >>>>

> >>>>

> >>>> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> >>>> Floyd

> >>>>

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

> >>>> >

> >>>> > Gemini seems to run best from 18 volt input, some use 16v.

> >>>> >

> >>>> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> >>>> >

> >>>> > Oz

> >>>> >

> >>>> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> >>>> > >

> >>>> > > Joe, Steve,

> >>>> > >

> >>>> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> >>>> > > Luis

> >>>> > >

> >>>> >

> >>>>

> >>>>

> >>>>

> >>>>

> >>>>

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

> >>>>

> >>>>

> >

> >

> >

> >

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

> >

> > Yahoo! Groups Links

> >

> >

> >

> >

> >

>











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



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

#44585 Dec 23, 2009

Hi Steve,

Agreed, the weight and the load can be different. The moment of the load can change everything. Long scopes are more demanding than short ones. Proper balancing is important too as it the routing of cables from the cameras and focuser.

Floyd

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

>

> I have been imaging with my GM-8 with a 20 lb load. I get nice tight round stars with good guiding, and the mount performs quite nicely at that weight. Tracking, slewing, and gotos are smooth and accurate, but on the other hand, I am imaging at a focal length of only 654 mm. I don't think weight alone is the whole story. The mount had problems carrying a Celestron 9.25 SCT. The total weight was probably about 24 lbs, but that scope is relatively long and heavy at both ends so inertia was more of a problem. Bottom line, its not just the weight of the load, its also the type of load, and what you want to do.

> ----- Original Message -----

> From: wforacer.rm

> To: Losmandy_users@yahoogroups.com

> Sent: Wednesday, December 23, 2009 9:38 AM

> Subject: [Losmandy_users] Re: PauloadLosmandyG11

>

>

>

> I have read and have herd from my AP club that AP is half of visual for all mounts (even AstroPhysics mounts) except Tak, were the Tak is under rated.

>

> cheers!

> Oz

>

> --- In Losmandy_users@yahoogroups.com, Jim Jones albiero@> wrote:

> >

> > And later under specifications it says "Instrument weight capacity 60 lbs."

> >

> > Jim

> >

> > bakersfieldbiker wrote:

> > > Hi,

> > > Can you point me to the ratings that you are stating? I did not see this listed on the Losmandy site, this is what they state.

> > > G-11

> > > EQUATORIAL MOUNT

> > > 60 lb. INSTRUMENT CAPACITY

> > > 100 lb. TOTAL CAPACITY

> > > Floyd

> > >

> > > --- In Losmandy_users@yahoogroups.com, "Shaft" mlhg0001@> wrote:

> > >

> > >> I believe you are incorrect. The recommended payload for visual on a G11 is 60lb and 30lb for imaging. Stands to reason the same applies to the GM-8. The rated capacity is 30lbs for visual and obviously something less for imaging.

> > >>

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

> > >>

> > >>> Hi Steve,

> > >>> The 30 lbs is suppose to be for photo work. Of course the weight is not the only consideration, so is the moment of the load. So, a longer scope will not work as well as a shorter scope. The further from the center of mass and rotation that the weight is placed, the more difficult it is to manage too, so yes the heavy ends of the scope would make it not as well matched to the mount.

> > >>>

> > >>> Also the focal length for the imaging scope as well as the image scale is a big consideration. The longer the focal length and smaller the image scale, the more demand is put on the mount.

> > >>>

> > >>> Then there is always the tripod to consider. I feel the GM-8 is limited by the tripod as much as anything. If it were mounted on a pier, it would probably fair better. Even place it on the G-11 tripod and it would be more solid.

> > >>> Floyd

> > >>>

> > >>>

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

> > >>>

> > >>>> Floyd,

> > >>>> What about the 30 lb load limit for the GM-8. Is that also supposed to be for photography? My GM-8 seems to be a bit overmatched by the task of carrying my C 9.25 at a total weight of about 25 lbs, but I think its a lot because the 9.25 is long and heavy at both ends.

> > >>>> Steve

> > >>>> ----- Original Message -----

> > >>>> From: bakersfieldbiker

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

> > >>>> Sent: Thursday, December 17, 2009 9:39 AM

> > >>>> Subject: [Losmandy_users] Re: PauloadLosmandyG11

> > >>>>

> > >>>>

> > >>>>

> > >>>> According to Losmandy, the 60 lb is for photography, instrument load. Not sure where the 50% of rated load figure comes from either, many use 60 or more lbs of load with photography and the G-11.

> > >>>> Floyd

> > >>>>

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

> > >>>> >

> > >>>> > Gemini seems to run best from 18 volt input, some use 16v.

> > >>>> >

> > >>>> > The 60lbs payload rating is for visual, in general, use half that for AP, but the G11 is fine with alittle more than half.

> > >>>> >

> > >>>> > Oz

> > >>>> >

> > >>>> > --- In Losmandy_users@yahoogroups.com, "lbarneo2003" lbarneo2003@> wrote:

> > >>>> > >

> > >>>> > > Joe, Steve,

> > >>>> > >

> > >>>> > > The slewing speed is 800; I will try down to 600 in the next session. The battery is a car battery: 12V, 60Ah, 540A; when I charge it fully the voltage rise to 15V; when I finish my astronomical session it down to 13.2V.

> > >>>> > > Luis

> > >>>> > >

> > >>>> >

> > >>>>

> > >>>>

> > >>>>

> > >>>>

> > >>>>

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

> > >>>>

> > >>>>

> > >

> > >

> > >

> > >

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

> > >

> > > Yahoo! Groups Links

> > >

> > >

> > >

> > >

> > >

> >

>

>

>

>

>

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

>







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