I just got back from a week of diving in St. Lucia. We stayed at Anse Chastanet and dove with Scuba St. Lucia. After almost 20 years of diving with my trusty Nikonos V and Ikelite Substrobe 150, I had my first trip with a digital setup, the Sea & Sea DX-8000G, and the Sea & Sea YS-25 Auto strobe. I'm still downloading the photos (over 500), but wanted to post my thoughts on the system while it's fresh in my mind. The first thing that I noticed is obviously the smaller size. The Ikelite strobe alone was almost as big as the entire Sea & Sea set up! My preferred lens with the Nikonos was the 20mm. With the S&S, I found I used the standard zoom feature most of the time. I do have the 0.6x wide angle converter for the S&S, too. I only used this for people shots or scenics (coral formations, sponges, etc.).
The first few days, I shot everything with the camera set on Auto. I figured it made sense to see how the system handled things without my help. While the images looked OK on the screen, when downloaded to a friend's PC, I found the colors to be lacking and the exposures to be rather washed out. Everything was in focus, and the colors were there most of the time. They just looked blah. I then went to fully manual for the rest of the week. I found setting the apeture to 4.7 at the wide end, which corresponded to 8.0 when zoomed in all the way, and the shutter at 1/100 seemed to work best. When we downloaded some of these images, the colors looked much better. This was what I was used to seeing with my Nikonos! With this setup, there were a few new things I had to remember, but with the system being digital, I knew as soon as I took the picture that I forgot something. I needed to remember to adjust the strobe to match the apeture on the camera. If I had the camera at wide, but left the strobe at f8, the image would be way over exposed. At the same time, if I was shooting zoomed in, but still had the strobe at f4.7, the image would be mostly black. The other thing I forgot to set sometimes was the macro setting. I would quickly realize it when the camera wouldn't focus on the subject.
Night dives were certainly a challenge. With my Nikonos setup, the Ikelite strobe had a built in modeling light. That was my dive light on night dives. Clearly that wasn't an option now, so I had to keep the camera in one hand and a dive light in the other. If I was close enough to my wife and her UK1200 light, I'd turn mine off and use the huge light output from the UK. However, I quickly discovered that I had to have a light pointed on the subject to see it in order to aim and focus the camera. With the old Ikelite strobe, it simply overpowered any lights that might be on the subject when I took the picture. The YS-25 strobe was not strong enough to overcome the light output from my wife's UK1200, so on a few shots, there's a hot spot where her light was shining. We finally worked out that if she was lighting the subject, she'd do so until I had the shot composed, at which time I'd nod and she'd move the light off the subject. If I was by myself, I'd aim my smaller light on the subject to compose the shot and then move the light away before hitting the shutter release. This introduced a new issue. Even though I was trying to keep the camera pointed at the same spot, once the light is moved off, I'd sometimes change my aim just enough to get the subject not quite where I wanted. Oh well.
One last thing on the YS-25 strobe. On some of the shots using the wide angle converter, the strobe didn't have enough coverage to fully light some of the larger coral / sponge formations. Of course, the strobe is so small, I might just get a second and shoot with two.
I've got 515 images to go through. When I get some of the better ones posted to one of my web sites, I'll post a link so you can see the results. I'll post the images unedited, so you'll see them as they came off the card. The water had a lot of particulate matter in it due to some heavy rains, so I'm going to have to learn how to edit those things out of some of the images.
If I think of anything I forgot to mention, I'll add to this thread. If you have any questions, fire away!