Hi Y'all,
Just took delivery of my 5Dmk2, fully intending to put it in my modified Subal C10 housing (now working with the 5dmk1 and 40d).
1) Shutter, Main and Rear Command dial should work fine
2) Top buttons needs adjustment, I only use AF/Drive as well as the ISO, so it shouldn't be too bad, unfortunately Canon moved the position of the illumination lamp, so may have to resort to using a small flashlight on night dives for that.
3) Video Mode, likely doable if I can shift one of the unused buttons to the direct print/live view button. I will have to change how I use the Set Button thought, I like it for Image Playback, but on the Mk2, it's the record button. Also, AF is possible with Video Mode, I will need to build a transfer pad to move the "*" button to press the AF-ON button. There are 3 AF Modes in Live View, in my decently lit office, the Live Mode couldn't focus at all, Quick mode does, so this will be a consideration for shooting video UW.
I haven't done any image testing yet, that's for the weekend. Shutter sounds very different from the Mk1, more of a subdued "Ka-thunk" than the Mk1's "Ka-think" ![]()
Rear LCD is gorgeous, much better than the Mk1. I'm running it off 6AA batteries using the BG-E6 grip, all in all, the camera fells ever so slightly chunkier in hand than Mk1 when in vertical orientation. Will try the fit in my housing tonight and report back tomorrow. No dives scheduled for a while though but may jump in a pool or something just to see how it works out.
Regarding AF, I've never had AF issues with my 5D, I've always shot AF underwater since my film days with the A2e. My 5Dmk1 was able to AF with the Suprema 44 LED light on mating mandarin fish. The 5Dmk2 seems snappier to focus but that's just subjective to me using the 100 USM macro and 85 f1.8.
Stu