12.5mm 14.5mm 16.5mm 21mm Right angle Roof Prisms (BK7,Fused silica)

Roof prism is combined with a right angle prism and a totally internally reflecting roof and they are attached by them largest square surfaces. It can invert and reverse an image, also, deflect the image 90° . Therefore, it is often used in terrestrial telescopes, viewing systems and rangefinders. 

Technical parameters