T2 Ring adapter ring for connecting a M42x.75 screwdriver adapter (present eg in many telescopes, eyepiece or telescope lenses) to the Canon EOS camera body.
If you plan to connect the body of a Canon SLR camera: - with a telescope, pay attention to projection connectors (CLICK) - with a microscope, see microscope adapters with T2 thread (CLICK)
SEE OTHERS T2