Specifications
EFL (mm): 89.1
Dia: 52
CT: 12
MATERIAL: BK 7
ET: 0.6
BF: 76.9
R1: 29.97
V1H1: -4.9
R2: 74.13
V2H2: -12.2
D: 73.2
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.