The half pentagonal prism is formed by cutting a pentagonal prism in half, and is often used in telescopes and other systems.
technical parameter
| Material | K9 |
| Dimensional tolerance | ±0.05mm |
| Angle tolerance | <1Minute |
| Surface Quality | 60/40 |
| Clear aperture | >90% |
| Face shape | <λ/4（25mm)@633nm |
| Chamfer | Protective<0.5mmх45° |
| Coating | AR HR Metal film |
