ZWO produces a range of quadruplet aprochromatic (APO) refractors from 65mm aperture to 130mm aperture with focal ratios of f/6.4 to f/7.7
Showing all 3 resultsSorted by popularity
Showing all 3 resultsSorted by popularity
ZWO produces a range of quadruplet aprochromatic (APO) refractors from 65mm aperture to 130mm aperture with focal ratios of f/6.4 to f/7.7