I am currently using a Lowepro Photo Trekker for a Canham DLC45 with 5-6 lenses, filters, meter, film holders, et. al., amounting to 22-28lbs of equipment. The backpack is certainly well made but I believe the layout is awkward for 4x5. I was wondering if the F.64 4x5 ("large" but not "x-large") backpack might be bett er. Both should store in an airline overhead, if not overpacked, since they are about the same size. My main concern is the weight distribution on the hips. The Lowepro is an excellent design for such, i.e., putting most of the weight on the hips and off the shoulders. Is the F.64 also good in this regard? I've se arched for pictures or diagrams that might show this part of the backpack and al so any specific discussions of this, but cannot find any. Thanks in advance.