The Vivitar DF-283 flash is a fully automatic, system-dedicated shoe mount flash. It features full TTL support for digital SLR cameras. The bounce, zoom, and swivel head will give you more creative opportunities with your shots. The four position zoom covers a focal length of 24mm, 35mm, 50mm, and 85mm. It can be set to bounce at 0 Degree , 45 Degree , 60 Degree , 75 Degree , and 90 Degree , and has a horizontal swivel of 270 Degree to allow for softer lighting. The flash includes a built-in slave function which allows it to be positioned off-camera, and triggered by any second flash. A red focus beam will help you achieve focus in low light conditions, and power saving circuitry incorporates an auto-off element, giving you more battery life. The included flash reflecting plate creates beautiful lighting which greatly improve your images. The wide angle diffuser can be clipped onto the flash head to soften and increase the coverage of light from the flash. Red-eye reduction will prevent your flash from reflecting off your subject"s eyes.