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Telescope or lens

Astro-Tech AT20RCT

astronomics.com/.../astro-tech-20-f-8-truss-tube-ritchey-chretien-optical-tube.html
TypeReflector: Ritchey Chretien
Diameter508 mm
Focal length4064 mm
Weightn/a
Users 0
Images 0
Most often used with

There doesn't seem to be anything here.