Summary: The DK-19 rubber eyecup works as advertised. It is easy to install as a replacement for the standard viewfinder eyepiece on your D3 and D700 (and I assume the D3X as...
Pros: Easy To Install, Protects eyeglasses, The Price Is Right
Summary: I purchased the DK-19 for my D700 on the recommendation of another photographer. I wear glasses and always seemed to be smashing my face into the view window on my D700...
Pros: Comfortable, Cuts stray light, Easy To Install
Summary: "allows for more comfortable viewing, especially for eyeglass users, with less stray light entering the viewfinder" -- It does exactly as claimed by Nikon.
Summary: The eyecup is a "must have" accessory. I have them on my D2xs and D3 and they keep out the stray light, which keeps me focused on taking the photo correctly.
Summary: Installed the DK-19 on my Nikon D700. The installation was quick, but you will probably want to read the instructions first. The eyecup is a huge improvement over stock.
Summary: Keeps stray light out of the viewfinder. Very helpful in low light shooting. I love eyecups, I only wish Nikon would include one with every camera!
Pros: Durable, Enhances viewing, Good Value, High Quality
Summary: Much better than the eyepiece that comes with the camera. It blocks out extra light, but is not stiff at all like some less expensive eyecups.
Summary: I got this eyecup with my D3. It is really comfortable if you wear eyeglass. Easy install and cheap. Get it if you do not want to often kiss your LCD.