I use a Billingham Hadley Pro, it takes my GFX with tilt adapter and 32-64 attached plus 23mm and 120mm in the main bag plus full Lee 100mm filter system in one front pocket and the holders, spare battery, spare SD Cards, notebook etc in the other front pocket. If needed I can get my Dell Latitude E7240 laptop in the main bag between the insert and the bag. All of this BTW fits into the left saddlebag on my Harley FXR.