Dual Separation Achromatic Lens
Material: Optical Glass
Lens Diameter:131mm
Focal Length:700mm 1200mm Astronomical telescope objective lens with multilayer blue / Green film
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
Off-centre 1 '
Remarks: two-piece refractive double separation objective lens group;
Used for astronomical telescope objectives, finder and collimation objective Lens
Green Film: Four-sided multilayer wideband film (400-700nm)
Shape : Meniscus
Usage : Optical
Structure : Double Convex
Material : Glass
Origin : Mainland China
Certification : none
Model Number : Double Convex Glass Lens
Diameter : 131mm