Specifications
EFL (mm): -200
Dia: 25
CT: 3
ET: 3.8
Material: BK7
R1: -47.84
R2: -90
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