Think Tank EP-10 Eyepiece is required to use any of the Hydrophobia Rain Covers with the Canon 1Ds Mark II, 1D Mark II, 50D, 60D, 60Da and Rebel Series*. Provides maximum protection, even in extreme conditions. It's water-tight with an improved fit and easily clicks into place so you know it's sealed and ready for action.
*Does not fit the Rebel T3/1100D that needs the EP-15.
Canon 1Ds MII,1D MII, 50D, 60D, 60Da, 70D, and Rebel Series