20RC Carbon Truss Ritchey-Chrétien Telescope 

A Ritchey-Chretien (RC) is a specialized Cassegrain reflector. All reflectors typically have an aberration called coma - all except for the RC. The hyperbolic mirrors of the RC make this design coma free. This is the main reason why nearly all professional observatories have chosen the RC design.

Basic Telescope Characteristics:

  • Diameter of Objective Mirror = 508 mm
  • Focal length = 4115 mm
  • F-ratio = f/8.1
  • Light Collecting Power (LMP) = 4032 x
  • Resolving Power (RP) = 0.28 arc second
  • Intrinsic Visual Limiting Magnitude = 14.5 mag
  • Magnification Power : min = 63x, max = 627x  


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