Specifications
EFL (mm): -170.2
Dia: 20.6
CT: 7.8
ET: 8.1
Material: F4
R1: -15.32
R2: -21.44
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