Nikon announces the Nikon Speedlight SB-400, an intelligent and versatile external flash unit that provides i-TTL flash operation in a super-compact and ultra-lightweight body at an affordable price. With its powerful guide number of 21, the SB-400 is an ideal flash unit for beginners in digital SLR photography, but it is also useful for hobbyists and professionals looking for a handy i-TTL flash unit offering an effortless bounce flash function. The SB-400 has been specifically developed to provide photographers with an entry-level external flash unit which is compatible with an i-TTL flash operation. When combined with cameras that are compatible with the Nikon Creative Lighting System, the SB-400 is controlled in i-TTL and D40's M (manual) mode. The SB-400's flash head can be tilted in 4 steps--horizontal, as well as 60, 75, and 90 degrees--and has a flash shooting distance range of between 60cm to 20m (depending on the camera's ISO setting). Slow Sync, Red-eye Reduction, and other flash modes can also be set on the camera body, enabling users to enjoy brighter and more natural lighting for better flash pictures