Taking images close up can be troublesome for standard camera lenses for a lot of reasons but Nikon has figured out how to beat these limitations with innovative close range correction technologies and faster apertures for higher quality even in low light conditions. The fish eye lens format gives you more width in your angles so you can capture more but you don't lose resolution or depth one any part of the picture including the edges.
This Nikon 16mm f/2.8D AF Fisheye Nikkor lens has a powerful integrated coating system that works automatically to correct color imbalances, aberrations, and ghost like and other distortions, on the fly. It acts like a high tech filter distributing light uniformly and balanced. In conjunction with distance information sent to the flash being more accurate and powerful, you get more brilliant pictures in any light or ambiance.