RS80N3 Shutter Release Remote Cord For Canon Shutter Release Cable for Canon EOS 1DX 1Ds 1Ds Mark II 1Ds Mark III 1D 1D Mark II 1D Mark III 1D Mark IV 7D 6D 10D 20D 20Da 30D 40D 50D 5D 5D Mark III 5D Mark IIXP RS-80N3 Remote switch for EOS cameras with the N3-type socket to prevent camera shake for super telephoto shots, macro photography shots and bulb exposures. The Remote Switch works just like a shutter button, enabling halfway or complete pressing. It has a shutter-release lock.