T ring for Canon EOS SLR/DSLR: Astromania T-ring compatible with Canon EOS and Rebel SLR and DSLR Cameras with EF Mount (Please Attention); including Camera EOS 5d 5d Mark Ii 50d 60d 20d 30d 40d 350d 400d etc Universal T-Adapter Included: Equipped with 1.25-inch (31.75mm) compatible with all standard 1.25" focusers of telescope; diagonal mirror ; barlow lens and other telescope accessories; Included standard 1.25” filter thread connect to telescope filter Quick & Convenient Installation: Just thread t adapter into t ring camera adapter via M42x0.75 T/T2 thread; then connect both ends of this camera adapter set sequentially to compatible SLR/DSL) cameras, as well as to telescope with 1.25-inch focuser Professional & Precise Detailed Design: All metal alumnium construction for long time use; Equipped with one hex wrench that achieve camera's easy angle adjustment; Straight grooves make it easy to screw and unscrew T ring during installing Excellent Astrophotography Tool: These telescope accessories are right equipment to shoot astronomical images of moon planets or nebulae with right telescope; Please note T ring does not have electrical contacts so need to focus&adjust aperture manually This set contains a T-ring for Ca non EOS Cameras and a 1.25" to M42 T-mount. They are made of high-quality material, durable for long time use. It fits almost all Camera EOS 5d, 5d Mark Ii, 50d, 60d, 20d, 30d, 40d, 350d, 400d, 450d, 500d, 550d, 600d, 1100d, 1d, 1d Mkiii, Digital Rebel T4i, T3i, T2i, T1i, Xt, Xti, Xsi, Xs, and All EOS SLR Camera. It is very easy to use: 1. Connect the T-ring mount and T-Mount by M42 threads. 2. Assemble the set to your camera. 3. Connect the camera with the set to the telescope by 1.25" (31.7mm) excircle on T-mount. Tighten the screws on the 1.25" adapter. Make sure they are locked and safe. 4. Put on the camera and calibrate focal length te get a clear image. Package Include: 1 * T-ring for Ca non EOS SLR/DSLR ; 1 * 1.25"-M42 T-mount