SB-800 is a very high quality professional model which weighs approximately 350 g without 4 or 5 AA batteries (optional fifth battery for quicker recycling) The Nikon SB-800 is a flash made by Nikon based on the earlier SB-80DX model for their digital and film single-lens reflex cameras. It has electronic interfaces for through-the-lens (TTL) automatic exposure and automatic zoom to match lens focal lengths from 24 to 105 mm (35 mm equivalent), plus 14 and 17 mm with the use of the built-in diffuser or 14 mm with the external Nikon Diffusion Dome, as well as film speed in the range from ISO 3 to 8000 (25 through 1000 in TTL mode with film cameras).