Buy from Amazon.com : http://fave.co/1GJ7mhh <br /><br />Sigma EF 500 DG Super Flash for Sigma SLR Cameras<br /><br />Product Description : <br />Powered by 4 AA batteries up to 220 flashes using alkaline type <br />Designed for AF 35mm and Digital SLR cameras <br />Maximum guide number of 165 in feet at 105 mm focal length ISO 100 <br />Built-in diffuser expands angle of illumination <br />Bounce flash with 90 degree upwards and 7 degree downwards tilt
