Specifications
EFL (mm): 19.9
Dia: 25.4
D: 25.4
CT: 13.5
ET: 0.8
R1: 15.9
R2: -15.9
BF: 14.6
V1H1: 5.3
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.