| Material | K9 B 270, JGS 2 |
| Focal Length (f) | ±2%@10.6unm |
| Dimensional Tolerances | +0/-0.2m |
| Center Thickness Tolerance | ±0.1mm |
| Centering (arcmin) | 3' |
| Power | 3 |
| Irregularity | 0.5 |
| Surface Quality | 60-40 |
| Clear Aperture | >90% |
| Coating | 400-700nm AR Coating |
| Size | Image Focal Length | Back Focal Length | Center Thickness | Edge Thickness | Radius of Curvature |
|---|---|---|---|---|---|
| 12.5*25.0mm | 12.5mm | 10.37mm | 3.8mm | 1.55mm | 9.81mm |
| 12.5*25.0mm | 15.0mm | 13.21mm | 3.2mm | 1.40mm | 11.77mm |
| 12.5*25.0mm | 20.0mm | 17.63mm | 3.6mm | 1.50mm | 10.34mm |
| 12.5*25.0mm | 25.0mm | 23.02mm | 3.0mm | 1.39mm | 12.92mm |
| 12.5*25.0mm | 50.0mm | 48.68mm | 2.0mm | 1.23mm | 25.84mm |
| 12.5*25.0mm | 75.0mm | 73.68mm | 2.0mm | 1.49mm | 38.76mm |
| 12.5*25.0mm | 100.0mm | 98.66mm | 2.0mm | 1.62mm | 51.68mm |
| 12.5*25.0mm | 150.0mm | 148.68mm | 2.0mm | 1.75mm | 77.52mm |