Short Tube APO vs AchroPosted By Alan French |
I had a UO 80 here for a while (an 80mm f/6.something achromat) and used it on the night sky and for daytime viewing. For low power viewing during the day it was fun. For higher powers - which I often use to look at birds - the secondary color was very obvious and very annoying. I wasn't fond of the purplish fringe along edges at all.
I am much happier with a somewhat larger apochromat, and I think such instruments are the best choice for daytime use.
Clear skies, Alan
I am much happier with a somewhat larger apochromat, and I think such instruments are the best choice for daytime use.
Clear skies, Alan