Summary

If you don't have a camera with a manual exposure setting and if you don't have an external flash, in other words if you have a rather basic  point and shoot camera then keep the following points in mind to get a better result:

  1. Only take a camera under water if your buoyancy is sufficiently under control.
  2. Release the trigger as careful as possible to avoid blur because of camera movement.
  3. Use the custom white balance function of your camera and repeat this if you change depth.
  4. Always process your pictures in a photo-editing program. Use the program that came with the camera, buy a commercial package or search the Internet for an Open Source free alternative. Correct exposure, contrast and color if needed.