Astromania 2" 45-Degree Erecting Prism Diagonal for Telescope

Precision Prism - Image erecting BAK4 prism with anti-reflection coating. High accuracy and high light reflection prism. Brass compression ring. Superior Craftsmanship - Internally matte blackened and threaded for no internal stray light reflection. Threaded for 2" filters. Ready to Go - 1. 25" adapter with brass compression ring included. Large, chromed thumbscrews. Beautiful Finish - Entirely aluminum, black anodized. Smooth finish. Features: - Prism: High quality BAK4 with anti-reflection coating - Materials: Entirely machined aluminum - Angle: 45 degree - Prism clear aperture: 31mm - 2"-1. 25" adapter with brass compression rings.