Orion’s ED80T CF Apochromatic Refractor Telescope is a 3.15-inch (80mm) f/6 optical tube assembly. It comes with a 2″ dual-speed Crayford focuser, a 2″ dielectric star diagonal, a 2″-to ...

Being a budget-minded individual, I usually work with lower-end telescopes. For this review ... This 4-inch (103 millimeter) apochromatic refractor from Vixen Ltd. is to the backyard astronomer ...

The telescope is a 2-inch (50mm) apochromatic triplet reflector with a focal ratio of f/5, ideal for a wide-field view of deep sky objects like galaxies, nebulas and open star clusters.