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Old 30-11-2011, 12:33 PM
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Loupy31 (Peter)
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Spacing a QHY10 for best image

Hi All,
I have recently purchased a QHY10, I am looking to use it with a 6.3 reducer flattener, on my ED120, ED 80 and my C8, Is there a specific distance the CCD has to be from the Focal reducer, As this is my first real go at Astrophotography, I am wanting to get as much info as I can on the setting up of Scope and Camera.

Regards Peter
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Old 30-11-2011, 01:17 PM
gbeal
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Peter,
not sure what the actual reducer/flattener is you are considering, but guess it is an SCT style??
If so, it should be OK on the C8, but I'd be hesitant to use it on the refractors, by all means try it, but don't expect miracles.
There will be a specific distance, the figure of about 75mm rings a bell, but you may have to experiment as well.
Gary
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Old 30-11-2011, 01:48 PM
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Loupy31 (Peter)
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Hi Gary,
Yes it is for a SCT. Is there a Reducer Flattener that would work well with the refractors, I Thought it would be too easy if it worked on all three scopes.

Regards Peter
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Old 30-11-2011, 02:35 PM
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Quote:
Originally Posted by Loupy31 View Post
Hi Gary,
Yes it is for a SCT. Is there a Reducer Flattener that would work well with the refractors, I Thought it would be too easy if it worked on all three scopes.

Regards Peter
Peter
The optimal distance is 110mm from the back plane of the fr/red to the plane of the ccd chip.
Allan
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Old 01-12-2011, 01:47 AM
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ReaPerMan (Paul)
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A bit more checking shows that it Depends on the manufacturer. Meade is 95mm, Celestron is 110mm and the Antares is 95mm

there is a bit more information at:

http://www.celestron.com/c3/support3...articleid=2243


Remember that the chip for the QHY10 is recessed by 20mm from the outside connection so you will need 90mm of spacing to the shoulder of the reducer. also be aware that it will not illuminate the full chip of the QHY10. You will get some viginetting of the image. I had this problem when I was using my .63 reducer with my C9.25. You can reduce the effect by taking good flats.

Good Luck

Paul

Last edited by ReaPerMan; 01-12-2011 at 02:13 AM.
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