Diameter |Tolerance 0/0.01mm

Focal Length Tolerance /-1%

Surface Accuracy L/4 irregularity @632.8nm

Surface Quality 60/40, 40-20 SD

Centration <30 arc min

Clear Aperture >90%

Bevel   Protective bevel

Material BK7, Fused Silica and other glass types

AR coating and BBAR