I took a Canon 20D on a one-day trip to the frontside of San Clemente Island, in California's Channel Islands. There is still a lot of newness here - I'm relatively new to UW photography, and this is only the second outing for the camera (except this was the first time out with the wide-angle lens). Visibility was for the most part in the 30-40ft range, not bad for summertime off the California coast. The sky was overcast so there was not much ambient light to work with. Please follow the link below to see a posting of photos from this trip.
The shooting was all done with a Canon 60mm macro on the first two dives, and the first test of the Canon 10-20mm on the third (and final) dive. It was apparent from the very first wide-angle shot that I'm going to be on a steep learning curve for a while.