Upload & Sell: Off
I shoot canon and able to fit a 5D3 with 24-70, 100mm macro, 28-135 (comparable in size to the 85 1.8) and sigma 10-20 (close the 35 I think) with room enough for the blower, card pouches, batteries, flash light (Torch) and cloths.
I've used it a few times now, even in heavily falling snow up near Mt St Helens and it was very comfortable and easy to work out of. The Hydration pack (optional) works out really well as well as the tripod attachment.
Weatherproof wise, its naturally water resistant, but also comes with an easily attachable watertight rain cover that tucks away on the bottom of the bag.