Specifications
EFL (mm): -84.4
Dia (mm): 25.4
CT (mm): 4
ET (mm): 5.9
BF (mm): -87
V1H1: 0
V2H2: -2.6
Material: BK7
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: 546.1nm
All dimensions are in millimeters.