subtle difference?Posted By James Suarez |
C-80 ED is a f/7.5, 600mm fl with a R&P focuser, Onyx is f/6.25, 500mm fl with a crayford focuser. The C-80ED is believed to have a fpl-53 element. The Onyx has Fluorite based, low dispersion glass. Guessing it's fpl-51.
I think it's safe to say the C-80 ED will have better color correction.
I think it's safe to say the C-80 ED will have better color correction.