- Parallelism: 0.5 arc minutes or better
- Size: 0.5 +0 / -0.005
- Thickness: 0.085 +0 / -0.12
- Scratch-Dig: 40/20
- Clear Aperture: 0.400 inch
- Flatness: TWF: 1 pwr, 0.5 irreg / RWF: 0.25 irreg
- Substrate Material: Zinc Selenide
$253.00
$253.00
$253.00
In Stock: 30