From Nikon
A sophisticated flash unit / Special functions with NIKON D2H, D1 and D100 Digital Cameras / Supports up to 3 slave units TTL and Non-TTL Auto Flash (A) with film cameras Intelligent i-TTL system supports Advanced Wireless Lighting, including 3 remote i-TTL Speedlight groups controlled through the master SB-800 D2H and SB-800 wireless lighting system makes operation as simple as an on-camera Speedlight Auto FP High Speed Sync Mode delivers fill flash in bright light as needed FV Lock (Flash Value Lock) allows photographer to change the composition or zoom for the shot, while maintaining desired lighting of the subject Wide-area AF Illuminator covers D2H's 11 AF sensors Compatible with every AF Nikkor lens Power Source - Four 1.5 V (AA-size alkaline), AA (AA-size NiCd) or AA-size lithium batteries, Quick Recycle Battery Pack SD-800 holds a fifth AA - size battery for faster power recycling Dimensions - Width Approximately 2.8 x Height 5.1 x Depth 3.7 inch Weight without batteries - Approximately 12.3 ounces
have recently gone from 35 MM to digital SLR. This flash is great. The manual is easy to read and the examples help alot too. This flash has taken my photos to the next level. This is a smart flash for up close, planned portraits or focus and shooting.