Specifications
EFL (mm): 250
Dia: 25
CT: 2.5
MATERIAL: BK 7
ET: 1.9
BF: 244.5
R1: 57.26
V1H1: -2.1
R2: 101.58
V2H2: -3.7
D: 243.7
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.