Ahhhh, refreshing Pearl Lake, did my AOW there. My deep dive segment was during a rainstorm, 48 F. at 65 ft.
This will be one of several opinions you will probably see.........................
I would set the camera to its first close up setting.
[OK/MENU] [Down Arrow] select the first little flower symbol. The second macro setting can interfere with some of your basic controls.
I would use manual settings, skip the underwater settings because they are more for salt water. I would try an ISO of 200, not too grainy, but high enough to give you a reasonable shutter speed and a stop or two down on aperture. Take a slate or something white down with you. Adjust your white balance off that object. You may have to recalibrate your white balance at various depths. Another trick with the white object is to take a picture of it at particular depths. This can give you a reference to correct to in your image processing program, for pictures taken at those same depths after your reference shot.
You can reach your white balance control by
![Stick Out Tongue :P :P](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f61b.png)
ressing [OK/MENU] [Rt. Arrow] to [Mode Menu], [Down arrow] to [Picture Menu], [Rt. Arrow] to the center column of choices, [Down Arrow] to [WB] or [WB+/-], [Rt. Arrow] to select your desired white balance.
Since this is sort of a test drive for you, I would strongly suggest shooting with RAW capture mode, but also select a jpeg duplicate to be captured at the ame time. This will facilitate review of your images without the delay of RAW conversion.
You can set your RAW capture mode by:
Pressing [OK/MENU] [Rt. Arrow] to [Mode Menu], [Down arrow] to [Picture Menu], [Rt. Arrow] to the center column of choices. Capture file selection is the top row in the center column, press [Rt. Arrow] then up or down to [RAW], press [Rt. Arrow] again to select the jpeg duplicate level desired (HQ would be fine for this purpose).
Better read the book, view the CD and try doing this topside, with the camera in your housing. Photographing a test subject under a fluorescent light will give you some white balance practice.
Try your flash on close subjects. To control your color balance in the background take a few test shots at different apertures, but with a fairly high shutter speed (1/125th sec., 1/250th sec.). This will let you achieve a warmer more pleasing background color, instead of a chalky green/grey which a metered shot would give you.
The flash will illuminate the subject and your aperture will control this part of the exposure.
Have fun. Be very careful to check the "O" ring seal in your camera case, after you have closed and latched it. Look for any debris, dust, fibers or a trapped hood or lens cover string. In fact, I wouldn't even bother with the lens cap.