Including cameras with EF 50mm f/2.5 compact macro, EF 100mm f/2.8 macro, EF 100mm f/2.8 macro USM, EF-S 60mm f/2.8 macro USM and MP-E 65mm f/2.8 1-5x macro photo lenses.
Also compatible with cameras with EF 100mm f/2.8L macro IS USM and EF 180mm f/3.5L macro USM lenses (Macrolite adapter required, not included). Maximum guide number 34.4'' at ISO 100.
Can fire together or independently for enhanced close-up photography. The flash supports E-TTL (TTL/E-TTL) wireless autoflash capability when used in conjunction with 1 or more Speedlite 600EX-RT flashes (not included).
Along with 2 forms of modeling flash let you preview lighting effects.
Makes operation simple, so you can easily adjust the flash settings depending on the existing lighting.