Just starting to play around with the HD Video on the 7D underwater. Anyone with more experience on this than I have any tips/tricks/observations?
I have a decent amount of experience shooting video with this camera on land, so most of what I have learned applies underwater. The one thing I find most challenging is getting a good exposure. The LCD tends to be not the best judge, and while on land I can have a nice optical magnifier like a Zacuto-Z finder to help judge exposure and focus, underwater this is much more difficult - especially in the changing light of a kelp forest, or going from shooting a school of fish horizontally in the water to aiming up towards the sun, for example. Anyone play around with the camera in manual but with AUTO ISO? What about peoples experience with focus... So far I have only shot with a 10-17 so pretty much set to f/6.3-11ish depending on light and focus on something close foreground and let the wide lenses depth of field do the rest - this has been for the most part somewhat successful, more so in bright tropical environments than dark California waters where I either need to bump up the iso to a level I am not comfortable with or open my aperture to where focus becomes more critical. I have played around with the various frame rates and while I much prefer 24p/50th sec on land, 30p/60th sec underwater suites the environment better I feel.
For HDSLR's being a pretty great added bonus to the underwater photographers toolbox, I am somewhat surprised to not see more on this topic posted on Wetpixel.