Check the listing for details. Full Metal 2'' 45° Correct Image Prism Diagonal Fully Multi-Coated for Telescope. Condition: New. Listed at 87.29 USD. Full Metal 2'' 45° Correct Image Prism Diagonal Fully Multi-Coated for Telescope Product Details: Item: 2 inch 45 degree Erecting Image Prism Interface: Standard 2 inch Body Material: Metal Prism Material: Optical glass Coating: FMC green film Weight: 494g Thread: Internal extinction thread for 2 inch filters Use: Astronomical Telescope 1.25 inch and 2 inch eyepieces Note: Do not use this product to directly observe the strong light source such as the sun, otherwise it will cause permanent damage to your eyes! Product Features: 1. Standard 2 inch 45 degree Erecting Image Prism 2. Full optical prism with FMC green film for better images 3. 2 inch large aperture for more light and better visual feelings 4. Bevel design to prevent falling, fashional looking 5. with 2 inch to 1.25 inch adapter ring fit for 1.25 inch eyepieces 6. Internal diaphragms and extinction thread for 2 inch filters 8. with copper protection ring for no harm to eyepieces Product Packing: 1pc 2 inch 45 degree Erecting Image Prism 1pc 2 inch to 1.25 inch adapter