Specifications
EFL (mm): 63.8
Dia: 50.8
D: 50.8
CT: 14
ET: 1.9
R1: 56.4
R2: -56.4
BF: 58.8
V1H1: 5
Specifications: Effective Focal Length (EFL): +/- 1%
Diameter (DIA): +0/-.18
Clear Aperture: 90% of diameter
Center Thickness (CT): +/- .25
Cosmetics: 60/40
Surface Quality: 2 1/2 x 1/2 waves @ 546.1nm
Centering Accuracy: 2 arc minutes TIA
Designed Wavelength: 546.1nm
All dimensions are in millimeters.