The Nikon DK-21M is a magnifying eyepiece for Nikon D40, D40X, D80, D200 and the new Nikon D300. The DK-21M replaces the stock DK-21 eyepiece that comes with the camera, and increases the viewfinder magnification by approximately 1.2x
price: $24.95 USD
Manufacturers web site: www.nikon.com
After using the Nikon DK-17M on the D2H I knew I had to get the DK-21M for the D200. On the D200 you can see why they don't offer the Eyepiece in higher magnifications then the 1.2x, as it can be hard seeing edge to edge on the D200. I never had that problem on my D2H. The DK-21M works good on wide aperture lenses, giving you better precision. As you can see in the picture below the Nikon DK-21M stands out a bit compared to the stock DK-21. I really like this as my nose is less squeezed against the LCD screen.
*Prices and rebates are subject to change. Listed price is from July 31, 2009