Flashes Command for camera

The Canon MR-14Ex Ring Lite for close-up and macro shooting is loaded with features and capabilities. Now with Canon's E-TTL, it takes full advantage of the flash performance of the EOS-1v, EOS-3, and other E-TTL cameras. Circular twin flash tubes can fire at even power, or varied between them over a six-stop range, and one or more 550EX Speedlites can be used as wireless slaves along with the MR-14Ex. The controller unit now has an illuminated full-info LCD panel and its accepts optional hi-capacity battery packs.Professional close-up flash photography becomes as easy as normal AE shooting when the MR-14Ex is mounted onto any EOS system camera that supports E-TTL metering (i.e., Type-A EOS