DIY Newtonian reflection astronomical telescope Mirrors Optical Glass 114mm F900

Description

Spherical
lens group
Newtonian reflection astronomical telescope Dia.114
Specification
Caliber: 114mm,
Focal length: 900mm, 500mm
The thickness of the main mirror about 15mm,
Spherical mirror, aluminum plating and protective film,
The minor axis of the secondary mirror (short side diameter) Length 25mm. and long side diameter 35mm
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