Opteka's Macro Ring Lite RL-600 for close-up and macro shooting comes equipped with many features and capabilities. Utilizing E-TTL (enhanced through- the-lens mode) technology, it takes full advantage of the flash performance of all Canon E-TTL cameras. The RL-600 attaches directly to any Canon lens via ring adapters. The RL-600 comes with a 77mm mount and includes 2 adapters to allow it to attach to 58mm and 52mm lenses.