Builtin Flash

This works quite well in air but has a limited range underwater. It can help restore colours in subjects that are close to the lens. Depending on the clarity of the water, light can bounce off small particles causing bright specks to ruin your image. This is known as backscatter.

To prevent backscatter you need to use an off camera flash to help position your light source in such a way that the light illuminates the subject and not the column of water in front of the lens. Flashguns are discussed in more detail later in the chapter. A small diffuser on the housing helps spread the light from the built-in flash, which is useful in preventing shadows with close-up photography. Another way of restoring colours is by using the Underwater mode.

The Underwater mode electronically restores reds over short distances. A much more successful method of colour balance in natural light photography is manual white balance which I will discuss in more detail later.

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