About the Celestron Universal Piggyback Mount... The Celestron Piggyback Mount is a great accessory for all observers interested in deep-sky astrophotography. This mount allows you to attach your camera, with its lens, to the top of your Schmidt-Cassegrain telescope. The Celestron Piggyback Mount connects to the optical tube of all Celestron 5, 6, 8, 11, 9.25 and 11-inch Schmidt-Cassegrain telescopes. Celestron Universal Piggyback Mount Features... Connects to the optical tube of all Celestron 5, 6, 8, 11, 9.25 and 11-inch Schmidt-Cassegrain telescopes Great accessory for all observers interested in deep-sky astrophotography Allows you to attach your camera, with its lens, to the top of your Schmidt-Cassegrain telescope Celestron Universal Piggyback Mount Specifications... Equipment Type: Piggyback Mount Application: All SCTs Construction: Aluminum Celestron Product Number: 93609