The Janco DF-C4 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 Janco DF-C2 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...