Camera skills set up your Camera
Prepare your Dslr for underwater action with these essential skills
01 try back-button focusing
Half-pressing the shutter button to engage autofocus can be rather tricky through the bag. So instead – if your camera allows it – try setting up back-button focusing. With this option enabled, focus is activated with the AF button on the rear of the camera body.
02 set a wide focal length
As you can see in the body below the surface here, the water has a magnifying effect. As such, it’s best to use a wide-angle lens, or the wide end of a standard zoom lens. Framing can be tricky underwater, so a wide angle also gives you the option to crop later.
03 use a narrow aperture
Focusing can be less than precise when shooting underwater – especially if your subject is moving towards you – so it’s best to use a narrow aperture as this will give you greater depth of field, meaning more of your subject and scene are in-focus.
04 Prevent motion blur
You’ll need a fast shutter speed to freeze the action, especially if you plan on capturing jumps and splashes. We used 1/500 sec. Our DSLR was set to Manual with Auto ISO on, so the ISO adapts to suit the conditions. At an f/11, ISO ranged from 100-400.