2013 I have increased my photography equipment and needed a new bag. I've been looking for and want me again buy a Slingshot backpack. But as my equipment has become more difficult and I needed a bag with which I can be well under way, the choice came to the Pro Trekker. My equipment consists of a EOS 7D with battery grip, an attached 24-105 mm lens, a 100mm macro, the 100-400 mm telephoto, flash, the filter bag from Lowepro, bellows, cloth and various accessories. In late summer, I was so on Photo Travel in Portugal and by the distribution of weight on the wide shoulder straps and hip, the backpack was great to bear. The lateral water bags I used to store water shoes size 47 and a lightweight neoprene jacket. Also ran'm the whole day and it wears very well in spite of everything. The build quality is great, a rain hood is attending and everything is well padded. I am absolutely delighted with the bag and the best part is, it is in spite of their size through as hand luggage and I've had it with the plane.
Absolute buy recommendation for ambitious amateur photographers!