Nissin Digital Di600 Bounce/Swivel Flash (for Canon EOS E-TTL) Allows for -1.5 to +1.5 EV compensation in half-stop increments A &quot;My TTL&quot; setting allows for adjustment of the TTL exposure level from -0.75 to +0.75 in 0.25-step increments Compatible with in-camera exposure lock Flash can also be synchronized to pre-flash and traditional wireless systems Rear curtain synchronization and red eye reduction is possible when used in conjunction with capable cameras