ASKAR 203APO f/7 TRIPLET REFRACTOR Free_Shipping 45 mm diagonal Quantum efficiency

45 mm diagonal Quantum efficiency >80% Read noise 0

The ZWO FF65 is a professional apochromatic flatfield Petzval quintuplet with a focal ratio of f/6

any error on each of the two components will sooner or later result in a tracking error

For Celestron OTAs with the old flat backplate please use the Baader V rail / dovetail bar 470mm for SC BA2451101

ASKAR 203APO f/7 TRIPLET REFRACTOR Free_Shipping 45 mm diagonal Quantum efficiencyThe Askar 203APO is an apochromatic air spaced triplet refractor that offers high performance for a low price compared to other large 8" triplets on the market. The objective lens features an element of extra low dispersion glass (ED) that minimizes chromatic aberration. The Askar 203APO has a 20% larger effective aperture area than the 185APO, giving greater light gathering power, resolution, brightness and contrast. Askar will soon release a