What are the Different Types of Optical Telescopes?

References: Telescope - Wikipedia https://en.wikipedia.org/wiki/Telescope Refracting (Refractor) Telescope - Wikipedia https://en.wikipedia.org/wiki/Refracting_telescope Reflecting (Reflector) Telescope - Wikipedia https://en.wikipedia.org/wiki/Reflecting_telescope Catadioptric Telescope - Wikipedia https://en.wikipedia.org/wiki/Catadioptric_system Schmidt-Cassegrain Telescope (extra telescopes that give examples of catadioptric telescopes) - Wikipedia https://en.wikipedia.org/wiki/Schmidt%E2%80%93Cassegrain_telescope Dobsonian Telescope (type of Newtonian telescope) - Wikipedia https://en.wikipedia.org/wiki/Dobsonian_telescope Telescope Focal Length - starlust https://starlust.org/telescope-focal-length/ Achromatic Lens - Wikipedia https://en.wikipedia.org/wiki/Achromatic_lens Apochromatic Lens - Wikipedia https://en.wikipedia.org/wiki/Apochromat Gregorian Telescope - Wikipedia https://en.wikipedia.org/wiki/Gregorian_telescope Newtonian Telescope - Wikipedia https://en.wikipedia.org/wiki/Newtonian_telescope Petzval Field Curvature - Wikipedia https://en.wikipedia.org/wiki/Petzval_field_curvature Comatic Aberration - Wikipedia https://en.wikipedia.org/wiki/Coma_(optics) Distortion - Wikipedia https://en.wikipedia.org/wiki/Distortion_(optics) Schmidt Corrector Plate - Wikipedia https://en.wikipedia.org/wiki/Schmidt_corrector_plate Ritchey-Chrétien Telescope - Wikipedia https://en.wikipedia.org/wiki/Ritchey%E2%80%93Chr%C3%A9tien_telescope Telecompressor (Focal Reducer) - Wikipedia https://en.wikipedia.org/wiki/Telecompressor Barlow Lens - Wikipedia https://en.wikipedia.org/wiki/Barlow_lens