T2 Ring, is an adapter to connect digtal DSLR body to telescope. This item is variable in different mount design for different make of DSLR cameras. No compatibility of EOS T2 ring with other maker. EOS T-Ring only works with Canon EOS series SLR cameras. Solidly built without internal screw ring and which is better for center axis with camera sensor.
Thread available in 2 versions - 42mm and 48mm. 48mm is for full frame while 42mm is for APS-C format.