I use a Lowepro Edit 100 which is great for the GXR A12 28 as it fits in vertically with the wrist strap uppermost (I prefer a wrist strap with this set up over a neck strap). There is room for a spare battery, remote release, table top tripod and cleaning stuff in the pockets. With the Edit series you can unzip the opening but still keep the flap velcro'd down between shooting. It has survived a lot of Scottish downpours.