Sigma EF-530 DG Super EO-ETTL II Electronic Flash for Canon EOS Equipped with New TTL Auto Flash Exposure - EF-530 DG SUPER is designed to work with the latest TTL auto exposure systems 35mm SLR Autozoom function for changing the illumination angle in accordance with the lens' angle of view. The flash head can be tilted up by upto 90 , to the left by 180 , or to the right by 90 . Bounce photography Auto Power-Off function prevents wasted power. AF auxiliary light is very convenient for photography in a dark place. As the flash head can also be tilted down by 7 , light can also be used for close-up shots.