The Nikon DK-21 Rubber Eyecup attaches to the viewfinder eyepiece of the Nikon D80, D90, D200 & D7000 Digital Cameras, minimizing extraneous light and reducing vision fatigue.
More information about Nikon Products: (Link to Nikon Website)
Nikon DK-21 Rubber Eyecup has been discontinued, here are some related products you might like:
The Nikon DK-21 Rubber Eyecup attaches to the viewfinder eyepiece of the Nikon D80, D90, D200 & D7000 Digital Cameras, minimizing extraneous light and reducing vision fatigue.
More information about Nikon Products: (Link to Nikon Website)