Specifications
EFL (mm): 50
Dia: 25.4
CT: 5.3
MATERIAL: BK 7
ET: 1.9
BF: 46
R1: 24.81
V1H1: -0.2
R2: 627.4
V2H2: -3.6
D: 45.9
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.