Celestron 8" Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly - 91073 Roof Prism Binoculars full multi-coatings and BaK-4 prisms

full multi-coatings and BaK-4 prisms maximize light transmission for the brightest

Once the slop factor is taken away

close up and personal

A set of 3 Star Knobs for the MiniTower/MiniTower II/MiniTower Pro/AZ Mount Pro level adjustment

Note: the actual external dimensions (except for the center hole) may vary slightly from the given specs

Celestron 8" Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly - 91073 Roof Prism Binoculars full multi-coatings and BaK-4 prismsCelestron 8" Rowe Ackermann Schmidt Astrograph Optical Tube Assembly Flat image field free of optical aberrations like field curvature, coma, astigmatism, and chromatic aberration across an entire APS C sensor NEW Ultra Stable Focus System six precision sealed ball bearings virtually eliminate image shift Integrated air cooling system 12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust Internal filter mount