Flash Accessory
Not compatible with E-TTL or E-TTL II; No automatic flash with EOS digital SLRs.
Compatible Products: Macro Ring Lite MR-14EX, Macro Twin Lite MT-24EX, Speedlite 200E, Speedlite 220EX, Speedlite 420EX, Speedlite 430EX, Speedlite 480EG, Speedlite 540EZ, Speedlite 550EX, Speedlite 580EX, Speedlite 580EX II.