Quote:
Originally Posted by cometcatcher
I use the Orion field flattener (available from Bintel) on my ED100 and it doesn't reduce focal length.
|
Yeah I saw that one but this line made me worry I wouldn't get good results as the ed100 is f9 "Designed for use with refractors with focal lengths of 400mm to 660mm and focal ratios of f/5 to f/7.5"
But I've heard from some that it still provides some correction a little bit outside of the range.