More from Amazon.com : http://www.amazon.com/gp/product/B00064XR6Y?tag=purrfectcatdi-20 <br /> <br />Sigma EM-140 DG Macro Ring Flash for Canon SLR Cameras <br /> <br />Fully dedicated with the latest TTL auto exposure systems <br />Flash tubes can be switched on or off for creative flash control <br />Wireless flash control high-speed synchro flash <br />Guide number of 14 <br />Ideal for close-up photography especially medical and scientific applications55mm and 62mm adapter rings are included with the flash
