I used to carry my underwater housing in a Lowepro Computrekker or Photo Trekker backpack. VERY sturdily built, very well padded - they've been carrying my camera gear across the world for years without a single problem to date. The only problem with them - they are heavy (3kg + when empty) and the external volume is much larger than the internal volume, due to the padding - which means they look large as well. That's not so good for carry-ons.
I just replaced this with a ThinkTank Airport Ultralight - their smaller backpack in the Airport series. Empty, the bag only weights 1 kg. It isnt as well padded as the Lowepro but it is physically a lot smaller - it is almost the same size as my laptop briefcase when I have it stuffed with laptop, papers, books, etc. And this sucker just EATS up gear.
In the TT bag, I can fit my entire macro setup:
- 1 DSLR body with 50mm lens attached
- Aquatica housing with Inon viewfinder attached (it is removable but I prefer not to take it on/off)
- Aquatica macro port with Backscatter 2x adapter attached
- 100mm macro lens
- spacer ring for the 100m macro
- 2 Inon Z240 strobes
- 1 Fisheye LED focus light
- memory card, spare batteries
If need be, I could even slip my Macbook on the outside (I usually carry my laptop in a separate laptop case, where I also put books, Archos video player and various odds and ends).
Along with this, I also bought a National Geo Medium Backpack - retro looks, not the most water-resistant of fabrics but again, a bag that is a lot bigger inside than you would guess from the outer dimensions. I could probably fit the dome port in the TT case if I wanted to go WA instead - if I want to carry my entire setup, then the NG Backpack carries the dome port and WA lenses.
I actually had the backpack weighed while leaving Bangkok, and it clocked in at 12kg - over the limit but not egregiously so, and when I pointed out that it was camera gear, they let it slide.
The only downside is that I now rely on one zipper to keep all my camera gear in place. With the Lowepro, there is an additional clip that can be fastened, which prevents the backpack from opening if the zippers fail or if you forget to close them up (before I had the Lowepro, I've wrecked a P&S housing this way; the Lowepro saved a repeat performance, this time with my 500/4, 100-400, 1D2 and 40D... my sphincter still clenches when I think of that).
With the TT, I am a little paranoid about all my gear crashing out. The zippers do look quite well made, but perhaps I'll get a locking camband to cover it.
It is my first TT bag (I'm a lifelong Lowepro guy for a bunch of reasons) and I'm very impressed.
Vandit

