EyePiece Eye Cup For Canon EOS 10D, EOS 20D, EOS 30D, EOS 40D, EOS 50D, EOS D30, EOS D60, EOS 5D, 5DII The Eyecup provides cushioning around the camera's eyepiece,and is especially useful to eyeglass wearers Cushions your face while looking through the viewfinder Made of rubber for soft eye contact. You can even view it with your glasses on Attaches to the viewfinder eyepiece minimizing extraneous light and vision fatigue For a more comfortable fit, replace the original one with this rubber eyecup