The Vivitar DF-283 Shoe Mount Flash is an economical full-TTL enabled flash with support of digital SLR cameras. It features a powerful Guide Number of 138' at 85mm setting and features a manual zoom flash head that covers a focal range from 28mm to 85mm based on 35mm full-frame sensor or film. The flash also offers remote triggering which allows for off-camera operation. This amazing tool will auto power-off when the battery has been idle for a certain amount of time. AF Assist with help the camera to focus in low-light situations, making each shot perfect. Add the Vivitar DF-283 to your collection today - you will not be disappointed!