Specifications
Dia: 50.8
CT: 10
Angle of Incidence: 45°
Specifications: Diameter (DIA): +0/-.15
Center Thickness (CT): +/- .15
Cosmetics R1: 10/5
Surface Quality R1: 1/10 wave @ 632.8nm
Surface Quality R2: Medium Grind
Clear Aperture: 90% of diameter