The Royal Photographic Society (RPS) is calling for entries for its 151st International Print Exhibition, a competition won last year by a non-professional photographer.

Last year?s overall title went to amateur photographer Richard Merritt who beat more than 2,200 entries worldwide to snap up the Gold Medal with his picture of a Scalloped Hammerhead Shark, photographed in waters off the coast of Costa Rica (pictured).

The contest has been staged almost every year since the RPS was established in 1853.

Boasting a total prize pot of £18,000 ? including £10,000 to the overall winner ? this year?s competition will award one Gold medal, two Silver and three Bronze medals.

The best photographer under 25 will bag an Olympus E-510 digital SLR camera kit.

And there will be a £1,000 prize awarded to the image which best reflects the theme ?Justice Around the World?.

The winners will be announced on 12 June when the best entries will go on show in an exhibition in Spitalfields, London.

The contest is open to amateurs, students and professionals and entrants can each submit up to four prints.

The closing date is 14 March 2008.

For details see the RPS website

Picture credit: Richard Merritt