B–6BOperationThis section covers basic procedures in i-TTL mode in combination with a CLS-compatible camera.v Notes on continuous fl ash photographyTo prevent the SB-910 from overheating, allow it to cool down for at least•10 minutes after 15 times of continuous firing.When continuous flash firing is repeated in quick succession, the internal safety•function adjusts the recycling time by up to 15 seconds. If flash firing continues,the thermal cut-out indicator appears on the LCD and all operations exceptpower ON/OFF and custom settings are suspended. (0E-23) Allow it to cooldown for several minutes to disable this function.The conditions under which the internal safety function is activated differ•depending on the temperature and the SB-910 flash output level.For use with High-performance Battery Pack SD-9 (optional), see “Using High-•performance Battery Pack SD-9.” (0H-11)STEP 1 Inserting the batteriesSlide the battery chamber coveropen while pressing the batterychamber cover lock release.Insert the batteries following the[+] and [−] marks.Close the battery chamber cover.Basic Operations