The DK-26 Eyepiece Cap from Nikon is compatible with the Nikon Df DSLR Camera. It is designed to cover the viewfinder window to keep stray light from entering the viewfinder and causing flare that negatively affects your exposures. The cap is meant for use in situations where you do not have your eye up to the finder, such as when using the self-timer or capturing images with a remote shutter release. It is included with the camera and offered here as a spare or replacement.
