See the key below this annotation for more information about each control or feature.
41 Battery chamber cover: When you pull back the catch with your fingernail the battery door pops open and you can remove the battery to put it in the charger.
42 Tripod socket: This is a standard screw size and you can attach tripod heads or quick release plates directly.
43 Contact cover for battery grip: You take this cover off to reveal the electrical contacts for the optional MB-D15 battery grip.