DIY Refraction astronomical telescope doublet objective lens 154mm

Refraction astronomical telescope double objective lens set 154mm DIY self-made
Suitable for primary lens diameter: 100-200mm Astronomical telescope optical system: refraction Lens Diameter: 154mm,  Effective diameter: 150mm Attention: 2pcs lens makes a objective lens group. Package includes: 2pcs lens per quantity
objective lens D=154mm F=750mm multilayer green film
diameter 154mm
focal length 750mm
Coating Four-sided multilayer broadband 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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