Alstar Telescope Diagonal, 45 Degree 1.25 Inch Correct Image Diagonal Prism

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Diagonal Prism Optical Prism inside rather than a mirror which makes your image clear and sharp
1.25 inch 45 degree mirror star diagonal for any telescope with 1.25 inch connector ;not suitable for Newtonians
More comfortable viewing orientation as you observe from above; filter thread for any 1.25 inch filter;. Accepts standard 1.25 inch eyepieces
This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes
Protective coating on the mirror to ensure a long life; metal barrel; for secure seating in the focuser