The narrower the aperture is, the deeper the depth of field. A wide open aperture creates nicely soft backgrounds with a shallow depth of field. Here, the depth of field is sometimes so narrow ...

But while relaxing within metres of the shoreline in the shallow water, which was no more than knee deep, he saw a ‘shadow’ nearby. Within seconds, a blue shark lashed out and went for him ...

In the early evening hours, Persians and other ancient peoples of the Middle East would pour water in long, shallow stone pools no more than a foot or two deep. They would return to the pools just ...