Specifications
EFL (mm): 4
Dia: 4.2
CT: 1.9
ET: 0.5
Material: S-BAL11
R1: 2.28
R2: Plano
BF: 2.8
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.