Compatible Cameras: The 5 PCS replacement eyecup for DK-23 for Nikon D300S D300 D500 D7100 DSLR SLR, please note that the total size is 1.7" x 1" x 0.24"
Block External Light: Eyecup effectively blocks out external light, allowing you to focus more on the frame in the viewfinder for more accurate exposure and focus
Easy to Intall & Remove: Mounts easily and securely to the viewfinder; slides easily into the Nikon camera's multiple ports and stays in place
Reduces Eye Strain: Compared to a bare viewfinder, Eyecup provides a more comfortable viewing experience and reduces eye strain that can occur during prolonged use
Better Protection: Eyecup serves to protect the camera viewfinder from falling off or scratching and to avoid light, dust and moisture from entering your viewfinder , thus extending the life of the camera