GSI Super Quality Eyepiece Extender For the CANON 40D, 30D, 5D, 20D, 10D, D60, D30, EOS 400D, 450D, 350D, 300D, 1000D, Digital Rebel XT, XTi, XSi, EOS Rebel K2, T2, Ti - Functions Exactly as the Canon Eyecup EF
The GSI Eye Cup Extender mounts between the camera's eyecup and the viewfinder. It provides a 15mm extension that makes the viewfinder easier to use - by keeping your nose off of the LCD, and thus avoiding smears. The eyepiece extender makes using the viewfinder noticeably more comfortable.