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Old 17-05-2017, 01:26 PM
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bojan
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Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,016
Quote:
Originally Posted by sil View Post
I'll probably be in your boat when the Tiny1 camera ships, I've got an old soviet 500mm mirror lens I'd like to mount it to for fun
No, you very probably won't ...

I have Rubinar 500, Rubinar 10_1000 and MTO1100-A.. All of them are very good in terms of coma and CA, however they are sometimes somewhat problematic in terms of astigmatism (main mirror is sometimes tightened too much and is a bit stressed/deformed, it needs to be relaxed).
Relaxation helped a great deal with 1000mm lenses, but not with Rubinar 500... so I will probably use it one day for guiding only.
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