Think Tank Hydrophobia Eyepiece EP-CMIII for the Canon 1D Mark IV,1D Mark III, 1Ds Mark III Cameras (Black) - Australian Stock
The black Hydrophobia Eyepiece EP-CMIII for the Canon 1D Mark IV,1D Mark III, 1Ds Mark III Cameras from Think Tank is required for use on your Hydrophobia rain cover. It allows you to see through the camera's eyepiece once the rain cover is installed.
Compatibility
Hydrophobia Compatibility