DIY astronomical telescope objective glass lens Green film
Specification
Dia. 62mm Focal 287mm
Coated with FGMC Green Film
It can be used on DIY Astronomic Telescope Objective, DIY guidscope
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
Eccentricity: 1'
Package includes: 1pc Achromatic Doublet Convex Lens.