Material: | BK7A |
Focal Length Tolerance: | ±0.5% |
Diameter Tolerance: | +0/-0.2mm |
Thickness Tolerance: | ±0.2mm |
Surface Flatness: | λ/10 |
Centration Error: | <3 arcmin |
Surface Quality: | 20/10 |
Clear Aperture: | >90% of central diameter |
Coating: | Optional |