ASKAR 203APO f/7 TRIPLET REFRACTOR Free_Shipping The ZWO FF65 is a

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

M68 BA2459118 - for cameras with male M68 x 1 threads

Since the ESATTO has a depth of 67mm and the 3

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

they emit primarily at specific wavelengths of light

ASKAR 203APO f/7 TRIPLET REFRACTOR Free_Shipping The ZWO FF65 is aThe 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