Specifications
EFL (mm): 18.3
Dia: 14
CT: 3.7
ET: 0.6
Material: BK7
R1: 9.5
R2: Plano
BF: 15.9
Specifications: Effective Focal Length (EFL): +/- 1%, under 15mm +/- 5%
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: 546.1 nm
All dimensions are in millimeters.