The T-ring for Ca non EOS Cameras allows you to attach a Ca non EOS 35mm DSLR or SLR camera to telescopes, camera adapters, and other astrophotography accessories equipped with standard T-threads. The bayonet-style attachment securely couples the Ca non EOS camera body to the telescope, adapter, or accessory. A T-ring converts a camera's mount to a standard T-thread, and this model is designed to work with all Can on EOS format camera bodies. All camera adapters, including Ori on, Cel es tr on and Mea de T-adapters and universal camera adapters, will fit the threads of this anodized aluminum T-ring. This T-Ring is designed to work with Can on EOS brand 35mm SLR cameras. It's also compatible with new digital SLR cameras.