Specifications
EFL (mm): 73
Dia: 27
CT: 3.5
MATERIAL: S-TIH1
ET: 1.3
BF: 68.8
R1: 25.76
V1H1: -2.2
R2: 47.84
V2H2: -4.1
D: 66.9
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: 587.1nm
All dimensions are in millimeters.