GSO RC 16 "f / 8 telescope - carbon truss tube.
GSO RC OTA is an optical tube dedicated to astrophotography. A real Ritchey-Chretien system with full coma and astigmatism correction, the most-valued optical construction among astronomical telescopes. This type of telescope uses two hyperbolic mirrors that completely eliminate coma and astigmatism, and the lack of correctors and lenses means no chromatic aberration.
The RC system has been designed primarily for applications in astrophotography. Its originators and implementers of the first projects: American George Ritchey and Frenchman Henri Chrétien, created an excellent optical system, devoid of coma - the most common defect, occurring in virtually all headlights. The use of hyperbolic mirrors eliminated this disadvantage, and as a mirror design, the RCT system does not exhibit chromatic aberrations typical of catadioptric systems.