Sirius 2 inch 45 Degree Prism Diagonal

Upgrade to a 2" diagonal to make use of ultra wide 2" eyepieces. The 1.25" adapter means you can still utilise your entire eyepiece collection.

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.