I'm still very new at the UW part of photography, though I've been taking photos on land for 37 years.
The most obvious things I need to improve are:
* Exposure. On my last (and first) trip, I was shooting manual exposure and manual flash. A lot of my photos are severely underexposed as a result. I have TTL strobes, but I was having trouble with it, and gave up on it early rather than try and figure out on the fly what I was doing wrong. Unfortunately the boat's photographer was no help in that regard.
I'm pretty sure I understand what I was doing wrong, and I'm itching to try TTL again to see if I get better results. I've also learned from my India trip that if you're shooting RAW, slight overexposure is more forgiving than underexposure, contrary to my experience with film or even JPGs.
I did pretty well with my macro and eel shots, because the subject was sitting still and I could take multiple runs at it while adjusting either aperture or flash duration. What I need to work on is getting proper exposures of more distant, moving subjects.
* Focus. I have a fair number of photos where the reef is in focus, rather than the fish. I need to be more careful in that regard, and maybe get in the habit of setting the AF point.
* Strobe placement. My manta photos have an absolute ton of backscatter in them. The boat's photographer on the same dive got photos that are really crystal clear. I probably need to adjust my strobe placement so they're facing more outward rather than directly at the subject.
* Composition. I'm told you do get better looking images if you shoot up and use water for the background. I seem to be mostly shooting down, because it seemed impossible for most subjects to get below them.
* Post processing. I simply do not understand how to use the Curves tool to best effect. I know what it does, but I can't duplicate the effects that a guy on another photography forum got by adjusting some of my photos, and he couldn't really explain to me what he was doing, either.
That's the obvious stuff. I'm also wondering what I don't know, the areas where I simply don't know enough to know where I could improve.
- Gus