This model of the Vivitar 840AF flash is dedicated to Canon EOS AF SLR cameras. It has a vertical bounce, which gives your images softer, more professional lighting. The 840AF automatically changes its illumination angle to match the focal length of the lens you are using, while the Auto Thyristor circuitry gives the flash a faster recycling time and more flashes per set of batteries.
1 Vivitar 840AF flash for Canon EOS
Unit defective when it arrived. Zoom setting LEDs on back blinked but unit would not flash. I ended up buying a Canon 430ex instead.