Refraction astronomical telescope double objective lens Group 131mm

Refraction astronomical telescope double objective Lens group 131mm
Astronomical telescope optical system: refraction Lens Diameter: 131mm, Focal Length 700mm/1000mm Effective diameter: 127mm Attention: 2pcs lens makes a objective lens group. Package includes: 2pcs lens per , lens group.
this Group contains the Lens holder ,
objective lens D=131mm multilayer blue film diameter 131mm focal length 700mm/1000mm Coating multilayer film 400-700nm Combined image quality 1/4-1/8 Diameter tolerance +0/-0.12 mm Center thickness tolerance ±0.2mm Focal length tolerance ±0.1% Finish 60/40 eccentric 1'

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