Fig.8 - Saturn & Jupiter behind a layer of clouds as seen through an 8-inch f/5 Teleskop-Service ONTC Newtonian reflector on an equatorial platform on December 20, 2020. Nikon D7500 (h-alpha modified camera), 1/13 s at ISO 200. A TeleVue 2x Powermate barlow lens was used, leading to an effective aperture of f/10 and a total focal length of 2000 mm.