With the Canon Speedlite 550EX, three successive flash shots can be bracketed automatically up to +/-3 stops in 1/3-stop increments. The flash output is changed for the three shots while the background exposure remains the same.
• Flash exposure bracketing is set with the 550EX. For details, see the 550EX's Instructions booklet.
• The flash exposure bracketing amount set with the 550EX is indicated by the flash exposure level indicator in the camera's viewfinder.
• Make sure the Speedlite 550EX is ready before taking the next bracketed shot. Singleframe shooting () is recommended.