Re: 900GTO Maximum Capacity for CCD Photography


Jan 19, 2007

 


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#16899 Jan 19, 2007

Hi,



Do you know, what is the maximum capacity of 900GTO for

astrophotography? Can I even dream of having 12.5" RCOS on 900GTO?



-Pete



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#16902 Jan 19, 2007

In a message dated 1/19/2007 7:18:11 AM Central Standard Time,

astronomy@... writes:



> Do you know, what is the maximum capacity of 900GTO for

> astrophotography? Can I even dream of having 12.5" RCOS on 900GTO?

>



Certainly!



Roland Christen





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



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#16903 Jan 19, 2007

The same also applies to the 900 QMD?



Jon L. Williams





At 11:03 AM 1/19/07 -0500, you wrote:

>In a message dated 1/19/2007 7:18:11 AM Central Standard Time,

>mailto:astronomy%40a1netti.com>astronomy@... writes:

>

> > Do you know, what is the maximum capacity of 900GTO for

> > astrophotography? Can I even dream of having 12.5" RCOS on 900GTO?

> >

>

>Certainly!

>

>Roland Christen

>

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

>

>





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



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#16904 Jan 19, 2007

In a message dated 1/19/2007 11:52:05 AM Central Standard Time,

bengoshi@... writes:



> The same also applies to the 900 QMD?

>

> Jon L. Williams



If you will be doing advanced astrophotography using precision CCD cameras,

then I would recomend the latest servo drive mountings for best results.

Capacity wise, all 900 mounts are the same, but control wise, the servo drives are

the way to go.



Rolando





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



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#16905 Jan 21, 2007

Geometry seems to count as much as weight for mount capacity - my

guess is that a folded scope like the RCOS would be fine, I believe

because the tube length is not that big in comparision to some other

designs.



I've been using a 16" f4.5 on my AP900:



santangeli.net/calstar2006/



It's ultralight for the aperture (62lbs including camera), and

probably the absolute max the mount can do, more because of the big

moment arm the OTA creates than the weight.



I'd be curious what AP's thinking was in stating the capacity of

70lbs... 70lbs refractor? Folded scope?



Pete

--- In ap-gto@yahoogroups.com, "meadefun" astronomy@...> wrote:

>

> Hi,

>

> Do you know, what is the maximum capacity of 900GTO for

> astrophotography? Can I even dream of having 12.5" RCOS on 900GTO?

>

> -Pete

>



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