Depends on what specific lenses you have. When I had my H3Dii-39ms I had the 80mm, 300mm f/4.5, 100mm f/2.2, 35mm f/3.5, 120mm f/4 Macro, and 35-90mm f/4-5.6 which fit in my Billingham 555 bag. I also managed to fit them into a Pelican 1510 case with dividers, which worked for carryon for the lenses, and then a smaller bag for the camera itself. The 1510 is great because its a roller, and now I have the foam dividers for my PhaseOne/Mamiya lenses including 300mm f/4.5, 35mm 3.5, 55mm f/2.8, 210mm f/4 ULD, 150mm f/3.5, 120mm f/4 MF D, and 105-210m f/4.5 ULD. Then I have the 1526 combo case, which I keep the camera, and possibly 1 or two lenses in. I find this case excellent for travel, because it has the classic pelican outer case, and then a fitted soft camera bag within it which can be used without the case. This is great for travel because it combines camera bag and a hard case for my MFDB, and if the hard case doesn't fit somewhere, then I can check the hard part, but can still carry my most valuable piece. Also the 1510 works great for me, because there is a additional piece for the top you can get which will hold some accessories, but more importantly has a sleeve for a 17inch laptop. Thats the stuff I use most of the time.
I've also looked at the F-stop bags, and discussed with them whether my equipment would fit in one of the backpacks. And it certainly sounds like they would fit in the largest pac they offer, not sure which model it is exactly right now.
