. . . so in clear water, is there usually enough ambient light to get a good shot (at least while learning)?
Yes, you can get good shots, as long as you learn about white balance and are shooting close to the surface in very clear water. Here is an example, shot with my former E-PL1, at about 5m on a bright day, with white balance adjusted on the computer afterwards:
But be warned, you will eventually want additional light! For example, I cannot think of a way to properly expose a reef scene with a bright surface visible (much less a sunball) in the frame without a strobe
Edited by troporobo, 29 April 2014 - 04:19 PM.