Close Focus Wide Angle

Close Focus Wide Angle is one of the "oldest tricks in the book" for many professional photographers, and has graced many magazine covers. The technique takes advantage of 2 inherent characteristics of super wide lenses: close focusing capabilities and great depth of field. 

Where

All waters, with particular emphasis in high visibility waters where secondary subjects and backgrounds can be far away from the primary subject.

DSLR + Mirrorless

ISO: 200 to 400
Mode: M Manual
Aperture: f/8 to f/16
Shutter Speed: 1/125
Technique: A wide angle or fisheye lens with a dome port is essential. Shoot at an upward camera angle with the dome very close to the object: no more than 1-2' away at most. With a very wide angle lens, this will often include the sun and surface in your image. 

Point + Shoot

ISO: 200 to 400
Mode: M Manual or Av Aperture Priority
Aperture: f/8 (or smallest available)
Shutter Speed: 1/125 to 1/200
Technique: A wide angle lens or dome is essential. Get close to your subject but stay off off the reef!

Strobes

Bring your strobes in very close to the sides of your dome to light the foreground subject. The background should be properly exposed based on the aperture and shutter speed you've chosen.