I've just tested this on my 300 with a MacBook 13 and I can put it in the place provided for the source in the back but it's not pleasant and in front it goes through too but it won't be protected ... Inside it's not possible ... For the photo mat there is not much space ... On the Lowepro website they said that my d800 and my 70-200 would fit ... Yes but not coupled and the d800 goes by forcing ... Otherwise the bag is great, I use it for cliffs and day hikes ...

Hello, I have just returned from 3 weeks of travel with this bag and I am very happy with it. I was able to slip an HP EliteBook 850 (14') into the outside pocket, but it's true that the priority of the bag is not to carry a PC/Mac.
Nevertheless, it is very well made, and very comfortable on the back even when fully loaded. As for photography, I had a Canon 100D + 3 lenses (1x 70-200 USM F4, 1x 17-40 F4, and 1x 50 F/1.4) with me at all times.