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12.5mm Optical Glass Focal Length 40 80 100 125 mm Achromatic Doublet Double Convex Lens DIY Astronomic Telescope Objective Lens Biconvex 1PC

Specification

Material Optical K9+ZF2 Glass

Diameter: 12.5mm

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Focal length: F=40mm
Tc1=3mm Tc2=1.3mm
R1=24.28mm
R2=-18.0641mm
R3=-52mm
Finish: 60/40
Eccentricity <3 points
Surface anti-reflection coating @400-700nm

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Focal length: 80mm
T1=3mm T2=1.3mm
R1=55.23mm R2=-33.18mm
R3=-84.53mm
Plating 400-700nm antireflection coating

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Focal length: 100mm
T1=3mm T2=1.3mm
R1=73.7mm
R2=-39.83mm
R3=-96.37mm
Finish: 60/40
Eccentricity <3 points
Surface anti-reflection coating @400-700nm

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Focal length: 125mm
T1=3mm T2=1.3mm
R1=100.08mm
R2=-46.88mm
R3=-109.15mm
Finish: 60/40
Eccentricity <3 points
Surface anti-reflection coating @400-700nm

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DataCaciques

On 10-Jun-20 at 05:26:17 EDT, seller added the following information:

DataCaciques

On 06-Jul-20 at 23:17:09 EDT, seller added the following information:

DataCaciques

Filed under: Eyepieces & Accessories