The Lowepro Pro Runner 350AW is a large, heavily padded backpack formedium to large sized SLR outfits. There’s plenty of room for a pro camera and one of them longf2.8 zooms- and then more lenses and flashes and radios and whatever else goes into a bigold bag like this when you’re a real-deal pro. Don’t ask me what, I just type descriptions for a living. Interior dimensions are approximately 13x30x40cm.