Foto&Tech 1 PC Canon EG Replacement Rubber Eyecup Eye Cup for Canon EOS 5D Mark IV/ 5D Mark III/ 5DS/ 5DSr/ 7D Mark II/ 1D-C/ 1D-X/ EOS 1D Mark IV/ 1D Mark III/ 1D/ 1Ds/ 1Ds Mark III DSLR Cameras Made of rubber for soft eye contact. You can even view it with your glasses on Cushions your face while looking through the viewfinder Attaches to the viewfinder eyepiece minimizing extraneous light and vision fatigue 100% Brand New, High Quality The Eyecup provides cushioning around the camera's eyepiece, and is especially useful to eyeglass wearers