Look, don't get me wrong; this is an excellent bag. It's well made, sturdy, well padded, and on and on and on. The straps are MILES better than 90% of the competitors, and the removable, padded waist strap is a home run. The snap buckles are first class and the zippers work great. But why, why, WHY is it (like ALL of the camera backpacks) actually smaller than described? I don't care what video boy Jeff What's-his-name prattles on about for 12+ minutes in his flashy, quick edit, in your face diatribe; the bag is smaller than he and everyone else says it is. I had a simple mission; First, I needed a bag deep enough to hold my Pentax K3-II, with the battery grip attached, which it is deep enough to do, both at the top of the bag and the bottom. Second, it also needed to accommodate that rig with my Sigma 150-500mm lens attached, which again it does both up or down, but better pointing up. Next, I needed it to hold my Sigma 120-400mm on one side, and my JBL Flip 4 speaker on the other. THIS is where things got "tight". When I measured everything before buying the bag, the numbers all worked, and if I was of a mind to remove the lens collars and hoods, it would be a breeze, but I'm not, and that wasn't how I measured it to begin with.. Unfortunately, once I received the backpack, it was clear that the width dimensions were off by at least an inch. Fortunately, a combination of some extra-creative packing and the "give" in the bag's sides and padding gets it all to work, but it is tighter than I would have liked and than I was counting on. After sending back no less than 3 other bags which were MUCH too small, despite THOSE published measurements, as well, I'm keeping this one, but unless you're carrying some really small gear, his bag is NOT "too big". BTW, note that NONE of the pictures of the loaded bag (or any of the other bags on Amazon) show the bigger lenses packed with the lens hood reversed, as you would normally store it. That's your clue. Had this bag matched the advertised size, this would have been a 5 star review, but it comes up one star short.UPDATE: So, used the bag for the second time and... the stitching for one of the side buckles gave out. *sigh* I am SO sick and tired of sending these bags back, I'll just find a way to stitch it myself. Make this a THREE star review.