It prevents extraneous light coming into the viewfinder from the rear, altering exposure. It provides an additional point of contact for steadier shooting when hand-holding and even when from a tripod. It allows you to concentrate on your composition. Just make sure you use the metallic ring to instal it to prevent it from falling off. Follow the instructions included.
Review 2 for DK-19 Rubber Eyecup
PostedNovember 20, 2010
Location SF, CA
Favorite Subject Travel
Nikon Family 11-20 years
Experience More than 10 years
Role Semi-professional photographer
Yes, this works with my D700. It's indispensable. It shield your eye from stray light from becoming a distraction. And lets you focus on photography. The down side is that the viewfinder glass is more prone to fogging up.
Review 3 for DK-19 Rubber Eyecup
It is compatible with a D700 too
PostedOctober 12, 2010
I like Nikon
Location Dana Point, CA
Favorite Subject Landscape
Nikon Family 2-5 years
Experience More than a year
Role Serious passion, hobbyist
Click on the image for close
It doesn't say it here but this eyepiece does work on a D700. I wrote Nikon's tech support about it and they said they would post the information, they never did. It's easy to install and I have had no problems with it. If you have a D700 and were wondering if this will work on it, it does, buy it.