I usually carry a Billingham Hadley Pro bag, with:
X-T1
X100
35mm f1.4
18mm f2
55-200mm
Samyang 8mm fisheye
Set of Lee seven-five filters
Spare batteries for both cameras
Spare SD cards
Cleaning kit
Macro extension ring
Clip-on flash
Emergency rain cover
Depending on what I'm doing that day, I might also have an iPad mini in the back compartment and an 11in MacBook Air inside behind the padded sections.
I suspect that the Hadley Pro might possibly exist in more than 3 dimensions, as it is a bit of a Tardis.
