Specifications
EFL (mm): 31.9
Dia: 38.1
D: 38.1
CT: 18
ET: 1.6
R1: 26.2
R2: -26.2
BF: 25
V1H1: 6.9
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.