So I ordered this, having seen the Amazon Basics knock-off version of it:
Proper Roady Photo Full Backpack, by Crumpler
It's been utterly fantastic for carting camera gear and a latop on planes (or any other time I need to travel with the "full kit". It holds a ton of camera gear and a 15" laptop, fits under-seat if it needs to, and is fairly comfortable once all the straps are adjusted right.
Here it is:
The grey and orange color was on clearance, now it seems to only come in black. The outside has held up well, after many flights and photowalk trips. The grey, with it's light texture seems to hide any dirt that it's picked up quite well.
Inside, the main compartment is covered with a separate mesh cover, so as you open up the bag to get at the inner flap, you don't need to worry about lenses coming out.
Another handy feature of the mesh panel and it's second pair of zippers is that you can only open it up in space to reach in for filters, batteries, etc. But I've found that I tend to put almost everything in this main area, especially for a big trip where I'm carrying chargers, filters, multiple lenses, my laptop power adapter, the speedlight, etc.
Here it's carrying:
- FX-sized body + 24-120 f/4 (well, except that I'm shooting with that one)
- DX-sized body
- 100mm f/2.8 prime
- 18-200 DX zoom
- 50mm f/1.8 prime
- spare hoods
- cleaning cloths
I no longer travel with the DX body, but in it's place I can put a speedlight (in its case), spare batteries, an external battery, cable, and charger for the phone, and portable external hard drive (photo backups). It's amazing how much fits into it.
One of the dividers, I've never really figured out the right way to use, however, so I keep it curled up, and the space on the other side of where my FX body goes is filled by the camera strap.
The main pouch's inner flap also has a mesh cover with a zipper, giving access to an area that's good for small flat things.
This has little pouches for stuff like SD cards and the Nikon IR remote.
On the outside, there are compression straps that can be used for big bulky things like tripods. I've never really used them except as extra closure insurance while traveling (as it makes it much harder to open the bag.
Hidden on the outside of the main flap is another pocket. This is good for 1-2 books (3 if they're thin paperbacks). But it works well enough for reading material when flying. If you've switched to a kindle, it's probably perfect, but it's a bit small for larger format books or thick books.
At the back, there's a very soft, well-padded pocket that readily fits a 15" MacBook Pro. I'm not sure if it would deal as well with a chunkier laptop like a ThinkPad.
Construction-wise, I've been worried about the stress on that zipper, since the straps anchor right at that zipper. But it's never given any signs of being stressed, even when the bag has 20lbs of stuff in it.
Strap-wise, it has good shoulder straps, with a chest strap, and a hip belt. It also has a mesh-covered padded back, to help with ventilation.
Unfortunately, the straps don't stow, so it can be sort of like an octopus when you get it out of the overhead bins on an airplane. The curved straps and the chest strap together make it pretty comfortable, and I only bother with the hip belt when I'm going to be standing with it for a very long time. It's not a great hip belt, but it works well enough to get some weight off your shoulders.
Overall, it's a solid bag. But it has a few limitations.
It really can't do anything other than carry camera gear. No side pockets, no document pockets, etc. It's always taking the camera (and laptop), but leaves you needing another bag for anything else (books, clothes, knitting, etc).
What especially frustrating is that it doesn't deal well with paper. Paper either goes in the main compartment, between the layers of mesh (where it's mashed out of shape by the stuff in the bag), or in with the laptop. But the laptop sleeve is so plush that paper really don't want to go into there, unless it's in a folder.
Getting stuff out can be slow.
One of the reasons I put the camera with lens at the top of the bag is so that I can get a camera out by just opening the inner and outer zippers a bit, and reaching into the upright bag. Perfect for stowing in the rear-driver-side footwell, and having ready access to the camera.
But if you need anything else, it has to be laid down flat, and the two sets of zippers opened. Then everything is right there, but it's on a table or on the ground, and then back on your back... It makes for slow cumbersome lens changes, and really limits where you want to open it up if the ground is at all dirty or muddy.
And so it's not at all a good bag for hiking. It's actually pretty abysmal at that. And it's not that great for photowalks, either. But it is great for traveling by plane, train, or automobile when you need to carry a bunch of stuff.
So if that's what you're looking for, it's fantastic, and highly recommended. But if you needs include other sorts of travel, with quick access to the camera (or other stuff), it's not the best.