The Lowepro 200 AW Versapack is to use perfect for big trips. He does not have quite as much storage space as other photo backpacks, but in real tours I do not wear too much kilos on my back too. He stowed without problems two DSLR including 5-6 lenses (mi. 50 1.4, max. 70-200 2.8 which is housed in the upper storage space) and is therefore still carry very well. The lower part of the backpack is padded and divided, you will find some small pockets and one large compartment, which I abswechseln for hiking utensils and larger lenses use. One of the main reasons was the ability to restrict access to the expensive DSLR (in some countries, an advantage). It is possible to close the backpack so that you have to open both the clips, as well as a zipper to get to the cameras. If you are then returned to safer areas on the way, can also be ensured by the forth pageview.