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Alpy at f/3 ?

Posted: Sun Aug 12, 2018 4:43 am
by Paul Luckas
I have a friend who is considering buying an Alpy to attach to a small Riccardi-Honders telescope at f/3. I presume it will work, not withstanding the possibility of light loss due to vignetting ?

Any obvious issues ?

Paul

Re: Alpy at f/3 ?

Posted: Sun Aug 12, 2018 8:48 am
by Olivier GARDE