Digital Concepts 528AF-NIK Auto Focus Flash for Nikon Digital SLR Cameras Custom designed to fit most Nikon digital and 35mm SLR cameras Features an automatic shutter speed setting, red-eye reduction, and an auto-focus/TTL metering Also features a focus beam to assist in low-light conditions Includes a flash-readiness indication viewfinder, as well as a guide number of 22 meters Weighs 12.8 ounces, measures 6 x 3.5 x 2 inches (W x H x D), and is backed by a manufacturer's limited warranty