Porro prisms are variants of the standard 90° prism but used as a pair to displace and invert a beam. Porro prisms are widely used in binoculars where they orientate the image correctly and reduce the total length of the binoculars by a small amount.
| Knight Optical (UK) Ltd | |
|---|---|
| Product Category | Optical Prisms |
| Product Number | PIJ2002 |
| Product Name | Porro Prism 20mm aperture |
| Largest Dimension | 20 mm (0.7874 inch) |
