Since I already own the Kalahari K31 and am super happy, I bought this camera bag for the little "baggage". It should be a camera bag that I can take for smaller events. But here it is already super tight. It combines with difficulty my Nikon D5000 with attached lens 18-55 next match narrowly my 55-200 lens. Then the bag is so good as full. A normal flash is no longer appropriate, but my Nikon SB200 I so just barely get pressed. But as I said, for the larger tours I have K31. If you at the K51 now omits the big lens, fits into a larger flash. And for that, the bag was intended. to bring this exact example on ceremonial occasions where you do not always need the 2nd lens really. Conclusion: DSLR camera plus lens attached plus BlitzPlus Kleinkram OR DSLR camera plus lens attached plus 2. Lens plus odds and ends in the front pocket; these 2 combinations there is room standard nothing to complain about. The processing is moderately super Kalahari. It lacks the rubber feet at the bottom, the shoulder pad and the raincoat, to the Kalahari K has 31. The shoulder pad can however change from K31 to this, the belt width is identical. The comfort is very good. As I said, the bag has still deserves 5 stars; I wanted a smaller camera bag. But who buys them for the big holiday or extended city tour, will not be able to take everything here. Since there is no way at the K31 goes past.