Quote:
Originally Posted by gregbradley
Beautiful image, I love it.
How do you find the Astrodon Gen 2 filters? Any reflection issues?
Do you use a flattener with your RCOS?
Greg.
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Thanks Greg!
I love my Astrodon Gen 2 filters. I of course know Don very well as he lives one hour away and is my partner in the Moorook Observatory so I have no problem getting filters
I see no reflection issues from the filters but with a large chip like the 16803 and the KAF09000 I had to tame reflections in the image train itself on the RCOS. These telescopes were not optimized for these large format CCD so I had to do some Mods to knock down scattered light.
A field corrector is important with these large chips with any scope below say a 20" RC. My home system (20"RC) shows a 46% curvature of field without an FFC and 16% with one. Of course you can process out some of the effects but it is nice starting with as flat a field as possible.
Regards,