70 72 73mm Telescope Cemented Doublet Objective Lens Achromatic DIY Optical Lenses Focal Length 280mm 700mm

Specifications:

Material: Optical Glass

Diameter: 70mm 72mm 73mm for choosing

Focal Length: 280-700mm for choosing

Surface quality: 60/40

Option Description:

For example, if you select 73F330R, 73 means the lens diameter is 73mm, F330 means the focal length is 330mm, and R means the lens is with red coating film.

B means the lens is with blue coating film, G means the lens is with green coating film.

Thank you!

Package:

1 PC Doublet Lens