- Parallelism: 30 arc seconds or better
- Size: 12.5 Ø +0.0 / -0.25
- Thickness: 1.52 ±nom
- Scratch-Dig: 80/50
- Clear Aperture: 90%
- Flatness: 0.25 wave per inch or better
- Angle of Incidence: 0
- %T (Optical Density): 63.10 ( 0.2 OD )
$51.00
$46.00
$39.00
In Stock