Clavius and Copernicus Posted on 26/05/2018 by philipp Crater Copernicus, 200mm GSO Newton f/5, QH5IIc camera, Televue 3x Barlow lens. Crater Clavius, 200mm GSO Newton f/5, QH5IIc camera, Televue 3x Barlow lens. The moon, 127mm f/8, Astro-Physics refractor, TC-20EIII, Nikon D750