Neewer 18mm Rubber Eyecup Eye Cup Eyepiece for Canon 300D/Rebel, 350D/XT, 400D/Xti, 60D, 600D/T3i, 500D/T1i, 550D/T2i, 450D/Xsi, 1000D/XS, D30, D60 Attaches to the viewfinder eyepiece minimizing extraneous light and vision fatigue It can minimize extraneous light and relieve visual fatigue Rubber Eyecup (18MM) for Canon Digital SLR Cameras. Comfortable ergonomic rubber design. Easy Installation. Note: camera is not included.