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 i TTL flash operation. When combined with cameras that are compatible wih the Nikon Creative Lighting System, the SB 400 is controlled in i TTL and D40 39;s M manual mode. The SB 400 39;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 39;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.