Specifications
EFL (mm): 12
Dia: 7
CT: 2.3
MATERIAL: BK 7
ET: 1.1
BF: 10.1
R1: 4.9
V1H1: -0.47
R2: 19.8
V2H2: -1.91
D: 9.8
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.