Digital photography has led to an explosion in photoblogs. "There's a much faster learning curve with digital photography. It's easier to become a better photographer," said Mr Nightingale.

"Photoblogs are very popular in the US, but they are beginning to catch on here," he added. "The beach was quite busy when I took this shot, yet this man was quite clearly lost in a world of his own."

View more of David Nightingale's photos at Chromasia