Quote:
Originally Posted by raymo
Martin, that was why I suggested a 1.5x, his 10"scope would still be significantly faster than any f/10 SCT not fitted with a reducer, and
slightly faster than the f/8 models. Worth a try if not too much money has to be expended in the process.
raymo
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Quote:
Originally Posted by Startrek
Yep worth a try !
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Thanks for the advice guys. I do have a cheapo 1.25" Barlow that was thrown in for free when I bought the Esprit. I might have a 1.25" - 2" adapter somewhere so will give it a try. I was definitely thinking deep sky so 1900mm focal length at f/7.5 would probably be good.
Another question though. Would I need to leave the coma corrector in place or should I leave it out. Accurate back focus distance might be difficult with coma corrector, Barlow and adapter. I'm guessing that off-axis coma is less of an issue with the longer focal length and smaller field of view?
Kevin