Celestron Canon M Mount T-Ring Black. If you have a Canon EOS mirrorless camera body the Celestron EOS M-Mount T-Ring is the one for you. How to Use To use this T-Ring place the M-Mount T-Ring on your Canon mirrorless camera. Just like changing a lens line up the T-Ring to your cameras lens mount. Push it in and turn until you hear a click. The T-Ring has a sturdy bayonet flange that locks for a secure fit. Once you attach the T-Ring to your camera youre ready to connect your telescope. The telescope side of the T-Ring has threads that accept a variety of camera adapters including the Celestron T-Adapter. The adapter you choose depends on the type of photography you wish to do. Body The Canon M-Mount 42mm T-ring is machined aluminum black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The T-Ring has a ribbed surface for a secure grip while threading/unthreading. The Canon M-Mount 42mm T-Ring is compatible with M42 x 0.75 (T-Thread) camera adapters. Specifications for Celestron Canon M Mount T-Ring: Manufacturer: Celestron Color: Black Quantity: 1 Weight: 1.76 oz Features of Celestron Canon M Mount T-Ring T-Ring attaches to M-mount Canon mirrorless camera bodies Works with Celestron T-Adapters 42mm female diameter thread Sturdy bayonet flange locks for a secure fit This T-Ring fits EOS M-mount mirrorless cameras only. It will not work with other Canon camera bodies like the EOS RF-mount or EOS EF-mount model cameras without adding a Canon adapter to convert those cameras to M-mount. Package Contents: Celestron Canon M Mount T-Ring Celestron 93407: Canon M Mount T-Ring Black