A direct replacement for the Canon EG Eyecup. The ProMaster 1210 eyecup has a soft cushion surrounding it for comfortable viewing, especially for eyeglass wearers. It helps to shield light, making it easier to see the viewfinder. This item is a direct replacement for the Canon EG Eyecup. Please see the specifications for a list of compatible cameras. Replacement eyecup for Cannon Eg. Fits Canon: 1D Mk III, 1D Mk IV 1Ds Mk III 1Dx, 1Dx Mk II, 1Dx Mk III 5D Mk III, 5D Mk IV, 5DS, & 5DS R, 7D & 7D Mk II