CELESTON Nexstar 5" (#11031) Schmidt-Cassegrain Telescope with accessories, The Celestron 1.25” Star Diagonal slides into the focuser (1.25”) of your refractor or catadioptric telescope and accepts standard 1.25” eyepieces, allowing you to view objects more comfortably. A diagonal that is angled at 90º helps avoid neck strain when looking through through the eyepiece. Please note that a 90º diagonal will display images that are right side up, but left to right orientation will be reversed..........The Star Pointer Finderscope adds “point and look” functionality to any telescope! This red dot finder keeps the sky right-side up, matching what you see with your unaided eyesThe adjustable red dot is bright enough to see day or nightAttaches to just about any telescope thanks to the small footprint, even works great with astronomical binoculars and spotting scopesIncludes mounting base.....THE SKY CD SOFTWARE, Celestron AC Adaptor.....and finally CELESTRON VISUAL BACK 1.25, Threads onto the rear of Celestron 5” - 11” Schmidt-Cassegrain telescopes. Accepts any accessory with a 1.25” insert barrel, including diagonals, eyepieces, Barlows, and other adapters