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Herschelian Telescope

(type of off-axis reflecting telescope)

A Herschelian Telescope is an off-axis Reflector Telescope with one mirror: a Primary Mirror that reflects toward one side. Presumably the primary mirror is spherical for ease in manufacture. It causes geometrical Aberrations but was useful when secondary mirrors were of poor quality.

(telescope type,reflector)

Referenced by:
Optical Axis
Reflector Telescope