Forgot to mention, Aarn has 'photo" pockets coming out anytime now. They are waterproof and padded, somewhat similar in size to the 10L ones.
Here is the description :

* Fit on all models except Marathon & Mountain Magics
* Divided for camera body and 3 additional lenses.
* Separate waterproof Dri-liners for camera and each lens
* Separate zip entry for top and bottom compartments
* Foam stiffened for stability.
* 4 mesh exterior pockets, 1 map pocket
* Converts to a daypack with add-on shoulder straps
* One torso length fits all
* 500D cordura, 210D ripstop nylon
* Grey/black

Volume 14L + 2L / pair
Weight 470gm / pair?

I correspond occasionally with him but I am just a satisfied customer and a fan...
Franco