TPO 6" f/9 Ritchey Chretien Reflecting OTA Telescope

Based on George Willis Ritchey and Henri Chretien optical design, the TPO 6" f/9 Ritchey Chretien Reflecting OTA Telescope is a versatile astrograph that can also be used for visual use. The RC Design contains a Hyperbolic shaped primary and secondary mirror to eliminate coma, chromatic aberrations, and spherical aberrations. For expert or professional astronomers interested engaged in scientific study, this telescope makes an excellent choice for astrometric measurements. Rear cell thread size is M90x1. TPO 6" f/9 Ritchey Chretien Reflecting OTA Telescope Highlights No Chromatic Aberration: a Ritchey Chretien doesn't use lenses or corrector plates, the design doesn’t suffer from chromatic aberrations ( false color). Goodbye Coma: an RC has virtually no coma No Spherical Aberration: The use of hyperbolic mirrors for both the primary and secondary removes the problem of spherical aberration. Long Back Focus: 150mm from the focuser or 235mm from the rear thread allows you to mount lots