I was looking for a suitable backpack for my Sony Alpha 6600. I already have a different backpack for the large Nikon. Of course, the Sony system would have fit in there too, but this large backpack is already quite heavy. The small Cullmann backpack is as light as a feather. But I don't think it's suitable for large cameras. A DSLR and a lens would probably be enough. It would be too small for my Nikon D750 and lens. But it's perfect for the Sony Alpha 6600. With the standard 16-70mm zoom from Zeiss, there's still enough space to store all the other lenses (3 fixed focal lengths from Zeiss & Sigma) in the backpack. Fortunately, the manufacturers usually make these lenses really compact and light. Thanks to the additional storage options, there's also enough space in the backpack to store drinks, a little food and the tripod (on the side). A few small compartments for batteries & memory cards round it all off. A really well thought-out product has been created here at a very reasonable price. If you are looking for a lightweight companion for your DSLR equipment, this is the one to go for. In terms of comfort, however, I miss an additional chest or hip strap. But that is the only criticism I have found so far.