The MR-14EX II has 12 custom functions and supports wireless E-TTL when linked with one or more Speedlite 600EX-RT flashes. This unit is compatible with the Canon EF 50mm f/2.5 Compact Macro, EF-S 60mm f/2.8 Macro USM, EF 100mm f/2.8 Macro USM MP-E 65mm f/2.8 1-5x Macro Photo lenses.
eBay