DescriptionNasmyth-Telescope.svg Deutsch: Strahlengang eines Nasmyth-Teleskops. English: Light path in a Nasmythtelescope. Date 20 September 2020 Source
focus telescope.svg English: Light path in a Prime focus telescope. Date 7 June 2009, 19:58 (UTC) Source Own work based on Image:Nasmyth-Telescope.svg by