... Use six AA BG-E9 Digital Camera Battery Grip Discription :The BG-E9 Battery Grip is an optional ... -E9 features a shutter button, control dial, AE FE Lock, exposure compensation and AF point selection ... including shutter release, AE/FE lock, AF on, and a Main Dial control wheel. Battery Grip Features: 1. ... It provides additional shutter release, main dial, AE lock/FE lock and AF point selection controls ...