Just as Proveg wrote a few weeks ago, I've got a 5dmkII, and looking to get a housing for it. I was first going for an Ikelite, but then got turned off by it since I could'nt use my 16-35mkII. I have however done some more thinking, and I can't really justify spending that much more money on something thats still a hobby, and have to be replaced when I get a new house. So back to the idea of Ikelite.
Since I have the 100 2.8 USM macro and the 35 1.4, I was thinking to get some kind of fish-eye, and then have both the wide end of the 16-35 and the long end. Too bad you can't change lenses under water...
The stuff I put together on B&H (way cheaper, even with freight and import tax and whatnot, then buying it in Sweden) is this:
Ikelite 6871.02 eTTL Housing f/ Canon 5D mark II $1,519.95
Ikelite Flat Port for SLR Housing for 4.1 to 5.125" (10.4 to 13cm) Lens #5505.45 $141.95
Ikelite Dome Port for SLR Housing for 3 to 4" (7.6 to 10.1cm) Lens #5503.50 $189.95
Ikelite 3944.52 Substrobe DS-51 Package $616.95
Ikelite 4044.1 Substrobe DS-51 Head Only for Digital Still Cameras $379.95
Ikelite SA-100 Deluxe 1" Diameter Ball Socket Arm System with 6" Double Ball #4086.61 $151.95
I've gone the route to 2xDS-51 flashes instead of the DS-160. The kit contains a Y-splitter for TTL. I'm not 100% sure about this, but two pairs seems to be recommended. Unsure if they will provide enough juice for a 15mm UW fishey though. I've also gone with Ikelite´s arms, mainly because I don't really know what else to get/what fits/what you can get a BH.
I have though about filming with the 5d, but I guess you need video lights to do that, and you can't really use a video light for shooting stills, can you? And there is this lingering fear that if a UW strobe is expensive, a video light would be even more so ...
Since I'm a cocktail diver, it will be used in warm clear water, I'm guessing a lot of times in Thailand on liveaboards or 2-dives a day trips with fairly large ships. Packing/size/weight will be of consideration.
Any feedback will be appreciated!
/Björn