45
Shutter speed. The amount of time the camera shutter opens to
permit light through the aperture and on the image sensor.
Fast shutter speed (125/sec and above) will stop action. Slower than
(60
th
/sec) will be blurry, unless the camera is held very steady or on a
tripod. As a general rule, use shutter speed values between 1/90 to
1/500 for underwater.
Backscatter: Fine particles of sand or plankton suspended in the
water that appear as small dots in your picture. It looks like it’s snow-
ing in the water. Move flash head as far away from camera lens as pos-
sible. Direct outer rim of flash beam at your subject, so you do not illu-
minate the water between the camera and the subject.
