Re: [Coronado_PST] Re: Use DMK41 on PST without an eyepiece?


Feb 2 1:13 PM

 


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#10172 Feb 2 1:13 PM

I tried to focus with my new mono CCD camera today. I could not get good

focus. Then I remembered a comment by someone that the nosepiece of the

camera had to be shaved a bit. Is that the case or is my deteriorating

memory worse than I think? G>.



High cloud is making it difficult to get a really good view of the sun.



I am struggling with getting the Meade DS2000 to track properly. I suspect

my polar alignment is really cruddy. I am shooting from the balcony of my

unit here in the resort and I wonder if metal is affecting the magnetic

compass. I compared the mag compass to my GPS compass and it was accurate

but out in an open area.



Don





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



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#10173 Feb 2 1:52 PM

You need to get the DMK41 very close to the top of the eyepiece tube to reach focus. I bought a short c-mount to 1.25" nosepiece (maybe 20mm long?) . Also look at the rear of the adaptor, a lot of them have a small flange at the rear which finishes against the CCD camera case. If this flange is present it needs to be removed.



Ideally the front of the CCD camera casing should be in contact with the top of the eyepiece tube.



regards

Kev

www.photosbykev.com

--- In Coronado_PST@yahoogroups.com, D Marcotte dmarcot@...> wrote:

>

> I tried to focus with my new mono CCD camera today. I could not get good

> focus. Then I remembered a comment by someone that the nosepiece of the

> camera had to be shaved a bit. Is that the case or is my deteriorating

> memory worse than I think? G>.

>

> High cloud is making it difficult to get a really good view of the sun.

>

> I am struggling with getting the Meade DS2000 to track properly. I suspect

> my polar alignment is really cruddy. I am shooting from the balcony of my

> unit here in the resort and I wonder if metal is affecting the magnetic

> compass. I compared the mag compass to my GPS compass and it was accurate

> but out in an open area.

>

> Don

>

>

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

>



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#10176 Feb 3 12:06 AM

The flange is probably part of the adaptor and you will need to get it

machined or filed off so that the camera can get closer to the tube. If you

remove the nose piece completely and just offer the camera upto the eye

piece tube you will most likely see the image come into focus.



regards

Kev



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

From: D Marcotte

Sent: Thursday, February 02, 2012 11:16 PM

To: Coronado_PST@yahoogroups.com

Subject: Re: [Coronado_PST] Re: Use DMK41 on PST without an eyepiece?



Thx Kev.



Mine does have the flange but I don't think it comes off. At least I can't

do it with my hand strength.



I will try an eyepiece and see what happens.



The high cloud has moved on but the sun is no longer visible from my

balcony. It's a beautiful day and I'll just have to accept that as my fate

G>.



One more question if I may - I got a Meade DS-2000 fork mount with Autostar

497 with the PST. It isn't tracking very accurately and I assume it is the

polar alignment. I am leveling the tripod and start with the scope pointing

north using a compass. I am wondering if there are any helpful hints for

getting a good PA during daytime.



Don

On Thu, Feb 2, 2012 at 1:52 PM, Kevin Lewis kevin@...> wrote:



> **

>

>

> You need to get the DMK41 very close to the top of the eyepiece tube to

> reach focus. I bought a short c-mount to 1.25" nosepiece (maybe 20mm

> long?)

> . Also look at the rear of the adaptor, a lot of them have a small flange

> at the rear which finishes against the CCD camera case. If this flange is

> present it needs to be removed.

>

> Ideally the front of the CCD camera casing should be in contact with the

> top of the eyepiece tube.

>

> regards

> Kev

> www.photosbykev.com

>

>

> --- In Coronado_PST@yahoogroups.com, D Marcotte dmarcot@...> wrote:

> >

> > I tried to focus with my new mono CCD camera today. I could not get good

> > focus. Then I remembered a comment by someone that the nosepiece of the

> > camera had to be shaved a bit. Is that the case or is my deteriorating

> > memory worse than I think? G>.

> >

> > High cloud is making it difficult to get a really good view of the sun.

> >

> > I am struggling with getting the Meade DS2000 to track properly. I

> suspect

> > my polar alignment is really cruddy. I am shooting from the balcony of

> > my

> > unit here in the resort and I wonder if metal is affecting the magnetic

> > compass. I compared the mag compass to my GPS compass and it was

> > accurate

> > but out in an open area.

> >

> > Don

> >

> >

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

> >

>

>

>





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







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Yahoo! Groups Links







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#10177 Feb 3 12:23 AM

This sounds like a job for my little lathe.

Don't file it. It will not look very smart.



Doing this change the camera will get into focus with a Barlow lens?

Sure?



Best regards

Thomas





At 11:06 AM 2/3/2012, you wrote: >

>

>The flange is probably part of the adaptor and you will need to get it

>machined or filed off so that the camera can get closer to the tube. If you

>remove the nose piece completely and just offer the camera upto the eye

>piece tube you will most likely see the image come into focus.

>

>regards

>Kev

>

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

>From: D Marcotte

>Sent: Thursday, February 02, 2012 11:16 PM

>To: mailto:Coronado_PST%40yahoogroups.com>Coronado_PST@yahoogroups.com

>Subject: Re: [Coronado_PST] Re: Use DMK41 on PST without an eyepiece?

>

>Thx Kev.

>

>Mine does have the flange but I don't think it comes off. At least I can't

>do it with my hand strength.

>

>I will try an eyepiece and see what happens.

>

>The high cloud has moved on but the sun is no longer visible from my

>balcony. It's a beautiful day and I'll just have to accept that as my fate

>G>.

>

>One more question if I may - I got a Meade DS-2000 fork mount with Autostar

>497 with the PST. It isn't tracking very accurately and I assume it is the

>polar alignment. I am leveling the tripod and start with the scope pointing

>north using a compass. I am wondering if there are any helpful hints for

>getting a good PA during daytime.

>

>Don

>

>On Thu, Feb 2, 2012 at 1:52 PM, Kevin Lewis

>sbykev.com>kevin@...> wrote:

>

> > **

> >

> >

> > You need to get the DMK41 very close to the top of the eyepiece tube to

> > reach focus. I bought a short c-mount to 1.25" nosepiece (maybe 20mm

> > long?)

> > . Also look at the rear of the adaptor, a lot of them have a small flange

> > at the rear which finishes against the CCD camera case. If this flange is

> > present it needs to be removed.

> >

> > Ideally the front of the CCD camera casing should be in contact with the

> > top of the eyepiece tube.

> >

> > regards

> > Kev

> > www.photosbykev.com>www.photosbykev.com

> >

> >

> > --- In

> mailto:Coronado_PST%40yahoogroups.com>Coronado_PST@yahoogroups.com,

> D Marcotte dmarcot@...> wrote:

> > >

> > > I tried to focus with my new mono CCD camera today. I could not get good

> > > focus. Then I remembered a comment by someone that the nosepiece of the

> > > camera had to be shaved a bit. Is that the case or is my deteriorating

> > > memory worse than I think? G>.

> > >

> > > High cloud is making it difficult to get a really good view of the sun.

> > >

> > > I am struggling with getting the Meade DS2000 to track properly. I

> > suspect

> > > my polar alignment is really cruddy. I am shooting from the balcony of

> > > my

> > > unit here in the resort and I wonder if metal is affecting the magnetic

> > > compass. I compared the mag compass to my GPS compass and it was

> > > accurate

> > > but out in an open area.

> > >

> > > Don

> > >

> > >

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

> > >

> >

> >

> >

>

>[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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#10178 Feb 3 2:48 AM

Before you do any machining on the nosepiece, first REMOVE the C/CS adapter from the camera housing and then screw the nosepiece back in to the housing. This may be enough to get in focus; I do not have a PST so I cannot be completely sure, but it works when I need more in-focus with my wedge.





--- In Coronado_PST@yahoogroups.com, Thomas Beckert beckert.th@...> wrote:

>

> This sounds like a job for my little lathe.

> Don't file it. It will not look very smart.

>

> Doing this change the camera will get into focus with a Barlow lens?

> Sure?

>

> Best regards

> Thomas

>

>

> At 11:06 AM 2/3/2012, you wrote:

> >

> >

> >The flange is probably part of the adaptor and you will need to get it

> >machined or filed off so that the camera can get closer to the tube. If you

> >remove the nose piece completely and just offer the camera upto the eye

> >piece tube you will most likely see the image come into focus.

> >

> >regards

> >Kev

> >

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

> >From: D Marcotte

> >Sent: Thursday, February 02, 2012 11:16 PM

> >To: mailto:Coronado_PST%40yahoogroups.com>Coronado_PST@yahoogroups.com

> >Subject: Re: [Coronado_PST] Re: Use DMK41 on PST without an eyepiece?

> >

> >Thx Kev.

> >

> >Mine does have the flange but I don't think it comes off. At least I can't

> >do it with my hand strength.

> >

> >I will try an eyepiece and see what happens.

> >

> >The high cloud has moved on but the sun is no longer visible from my

> >balcony. It's a beautiful day and I'll just have to accept that as my fate

> >G>.

> >

> >One more question if I may - I got a Meade DS-2000 fork mount with Autostar

> >497 with the PST. It isn't tracking very accurately and I assume it is the

> >polar alignment. I am leveling the tripod and start with the scope pointing

> >north using a compass. I am wondering if there are any helpful hints for

> >getting a good PA during daytime.

> >

> >Don

> >

> >On Thu, Feb 2, 2012 at 1:52 PM, Kevin Lewis

> >sbykev.com>kevin@...> wrote:

> >

> > > **

> > >

> > >

> > > You need to get the DMK41 very close to the top of the eyepiece tube to

> > > reach focus. I bought a short c-mount to 1.25" nosepiece (maybe 20mm

> > > long?)

> > > . Also look at the rear of the adaptor, a lot of them have a small flange

> > > at the rear which finishes against the CCD camera case. If this flange is

> > > present it needs to be removed.

> > >

> > > Ideally the front of the CCD camera casing should be in contact with the

> > > top of the eyepiece tube.

> > >

> > > regards

> > > Kev

> > > www.photosbykev.com>www.photosbykev.com

> > >

> > >

> > > --- In

> > mailto:Coronado_PST%40yahoogroups.com>Coronado_PST@yahoogroups.com,

> > D Marcotte dmarcot@> wrote:

> > > >

> > > > I tried to focus with my new mono CCD camera today. I could not get good

> > > > focus. Then I remembered a comment by someone that the nosepiece of the

> > > > camera had to be shaved a bit. Is that the case or is my deteriorating

> > > > memory worse than I think? G>.

> > > >

> > > > High cloud is making it difficult to get a really good view of the sun.

> > > >

> > > > I am struggling with getting the Meade DS2000 to track properly. I

> > > suspect

> > > > my polar alignment is really cruddy. I am shooting from the balcony of

> > > > my

> > > > unit here in the resort and I wonder if metal is affecting the magnetic

> > > > compass. I compared the mag compass to my GPS compass and it was

> > > > accurate

> > > > but out in an open area.

> > > >

> > > > Don

> > > >

> > > >

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

> > > >

> > >

> > >

> > >

> >

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

> >

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

> >

> >Yahoo! Groups Links

> >

> >

>

>

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

>







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

#10182 Feb 3 11:25 PM

On Fri, Feb 3, 2012 at 12:06 AM, Kevin Lewis kevin@...> wrote:

> **

>

>

> The flange is probably part of the adaptor and you will need to get it

> machined or filed off so that the camera can get closer to the tube. If

> you

> remove the nose piece completely and just offer the camera upto the eye

> piece tube you will most likely see the image come into focus.

>

> I don't have access to a lathe so it will have to be put off. I am

uncomfortable with messing with that kind of mod anyway (fear of screwing

up basically G>).



I had another solution tonight. Today UPS delivered a C-mount-->EOS adapter

and now I can use any lens on the moon that I have on hand.



At the suggestion of a friend, I even managed to connect the DMK41 to a

Hyperion eyepiece. The C-mount-->EOS is female, and the Hyperion e-p-->T2

adapter ring then screws into a T2-->EOS male adapter. The male/female

"make out" and I have an 8-24 Zoom which can deliver a tremendous

magnification with a 400mm lens. I probably won't use it often.



This afternoon I tried to video the moon using the 400/5.6 untracked. The

moon image was basically filling the FOV and moving quickly. I

haven't processed any of the 60 sec videos yet but I am not very hopeful

that anything useful came out of it.



Tonight I did a rudimentary polar alignment on the DS2000 mount but the

moon still drifted. I switched to my EF 300/4L lens to reduce the size of

the moon. I have ~10 x 60 sec videos from tonight. I have doubts that

Registax can handle the movement in the frames. Perhaps it can if I can

fine tune the parameters but I don't know how to determine what is the max

distance, for example, to put in the appropriate field for movement.



It's so nice to be able to relax while on vacation VBG>.



Don





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



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#10183 Feb 3 11:28 PM

On Fri, Feb 3, 2012 at 2:48 AM, bob bob71741@...> wrote:

> **

>

>

> Before you do any machining on the nosepiece, first REMOVE the C/CS

> adapter from the camera housing and then screw the nosepiece back in to the

> housing. This may be enough to get in focus; I do not have a PST so I

> cannot be completely sure, but it works when I need more in-focus with my

> wedge.

>



I can't remove the flange from my DMK41 nosepiece. I don't want to use

pliers or or anything that could mark or bend or crack it. It looks like it

should be removable but I can't do it with my fingers.



Don





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



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#10184 Feb 3 11:48 PM

On Fri, Feb 3, 2012 at 12:23 AM, Thomas Beckert beckert.th@...>wrote:

> **

>

>

> This sounds like a job for my little lathe.

> Don't file it. It will not look very smart.

>



I agree with you on that but you don't live near me G>. And I am on

vacation 1200 miles from home anyway.

>

> Doing this change the camera will get into focus with a Barlow lens?

> Sure?

>

Interesting question. I assume it would be OK but but I wouldn't know for

certain till I tried it.



I was hoping to get the DMK41 in focus without any eyepiece whatsoever.

Without shaving the nose-piece I am confident that a Barlow would work but

wanted to try the DMK41 without it. I wanted a smaller sun to play with.



Don





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



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#10185 Feb 4 12:27 AM

You can achieve focus if the front of the DMK41 camera casing touches the top of the PST eyepiece tube. As you've already found out you can also use a DSLR on top of a Baader Hyperion 8-24mm zoom EP with the right Baader adaptor. www.photosbykev.com/wordpress/photography/pst-solar-imaging/



best regards

Kev Lewis



--- In Coronado_PST@yahoogroups.com, D Marcotte dmarcot@...> wrote:

>

> I tried to focus with my new mono CCD camera today. I could not get good

> focus. Then I remembered a comment by someone that the nosepiece of the

> camera had to be shaved a bit. Is that the case or is my deteriorating

> memory worse than I think? G>.

>

> High cloud is making it difficult to get a really good view of the sun.

>

> I am struggling with getting the Meade DS2000 to track properly. I suspect

> my polar alignment is really cruddy. I am shooting from the balcony of my

> unit here in the resort and I wonder if metal is affecting the magnetic

> compass. I compared the mag compass to my GPS compass and it was accurate

> but out in an open area.

>

> Don

>

>

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

>



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#10192 Feb 4 10:32 AM

I just tried it without the C/CS adapter. It's better but I could not get

it to achieve focus.



On to Plan B (maybe it's C now......). I will try a Barlow.



Don

On Sat, Feb 4, 2012 at 8:15 AM, D Marcotte dmarcot@...> wrote:



> Thx Bob. I never looked closely at the camera end so didn't realize that

> the C/CS adapter was indeed an adapter and could be removed.

>

> There is some high cloud here again (4th day in a row for morning cloud).

> But I will definitely try it out in a bit. Being able to shoot from my

> balcony makes it real simple.

>

> As an aside, I was surprised by how off target the Auto shutter and gain

> settings were in the IS software defaults. I had to go to manual in both

> before I could get something other than white light.

>

> Don

>

>

> On Sat, Feb 4, 2012 at 5:11 AM, bob bob71741@...> wrote:

>

>> **

>>

>>

>> Don - I am not talking about the flange on the nosepiece; I've added

>> three photos to the photo section to show what the C/CS adapter is and how

>> to remove it. Removal will get you 0.2 inches closer, which is more than if

>> you machine the flange off. All Imaging Source cameras come with this

>> adapter as standard in case you have different lens types (C or CS); this

>> adapter is not required for use with the nosepiece.

>>

>> --- In Coronado_PST@yahoogroups.com, D Marcotte dmarcot@...> wrote:

>> >

>> > On Fri, Feb 3, 2012 at 2:48 AM, bob bob71741@...> wrote:

>> >

>> > > **

>> > >

>> > >

>> > > Before you do any machining on the nosepiece, first REMOVE the C/CS

>> > > adapter from the camera housing and then screw the nosepiece back in

>> to the

>> > > housing. This may be enough to get in focus; I do not have a PST so I

>> > > cannot be completely sure, but it works when I need more in-focus

>> with my

>> > > wedge.

>> > >

>> >

>> > I can't remove the flange from my DMK41 nosepiece. I don't want to use

>> > pliers or or anything that could mark or bend or crack it. It looks

>> like it

>> > should be removable but I can't do it with my fingers.

>> >

>> > Don

>> >

>> >

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

>> >

>>

>>

>>

>

>





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






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