The prism housing is made of precision molded ABS plastic and the two sleeves are made of metal - which ensures a tight fit and long grip. Use a clamping screw made of aluminum to fix your eyepiece. So you can even look sideways through your telescope - the eyepiece does not sit and fall out. From now on nature lies at your feet: even if it is far away. Simply insert the erecting prism into the 1.25 "focuser and enjoy upright and right-angled images with your eyepieces - watch birds, deer at the edge of the forest, the summit cross on a mountain or a cruise ship far out on the sea. The prism gives you a bright and clear picture: The prism is made of genuine optically processed BK7 glass, high quality optical prism inside rather than a mirror which makes your image clear and sharp. The Amici prism looks as beautiful as binoculars, but you can zoom in much higher with your eyepieces. Comfortable observation with 90-degree: Look pleasantly from above into your eyepiece, filter thread for any 1.25" filter and accepts standard 1.25" eyepieces. Typically, you see the picture standing upside down. But what if you also want to observe nature? With this 90-degree erecting prism transform your telescope into a telescope for nature observation with upright and left-right corrected image. This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes.

Water Resistance Level: Not Water Resistant. Photo Filter Effect Type: Color Correcting. Coating Description: Multi Coating. Photo Filter Thread Size: 32 Millimeters. Material: Aluminum, Glass, Plastic. Brand: Astromania. Manufacturer: Astromania. Date First Available: August 17, 2015. Is Discontinued By Manufacturer: No. Best Sellers Rank: #94 in Telescope Filters. Customer Reviews: 4.6 out of 5 stars 65 ratings 4.6 out of 5 stars. Item model number: SKU_AM_EP1D90. : B0140U9XXK. Item Weight: 4.6 ounces. Product Dimensions: 4.42 x 2.8 x 2.11 inches.