Twelve photographers have been shortlisted for the prestigious fourth Prix Pictet. This year's theme for the photography prize is Power.

The artists, all with outstanding portfolios, come from ten countries: Algeria, Azerbaijan, Belgium, France, Netherlands, South Africa, Spain, United Kingdom, United States and Vietnam.

Lens Culture is pleased to provide an overview of the finalists' portfolios here with 115 images.

A finalists’ exhibition will be held at the Saatchi Gallery in London in October, where on 9 October the winner will be announced by Kofi Annan. The exhibition will then run from 10-28 October 2012.

The artists nominated for the Fourth Prix Pictet are as follows:

ROBERT ADAMS
(United States, 1937)
Nominated for series: Turning Back, 1999

DANIEL BELTRÁ
(Spain/United States, 1964)
Nominated for series: Spill, 2010

MOHAMED BOUROUISSA
(Algeria/France, 1978)
Nominated for series: Périphérique, 2006

PHILIPPE CHANCEL
(France, 1959)
Nominated for series: Fukushima: The Irresistible Power of Nature, 2011

EDMUND CLARK
(UK, 1963)
Nominated for series: Guantanamo: If the Light Goes Out, 2009

CARL DE KEYZER
(Belgium, 1958)
Nominated for series: Moments Before the Flood, 2009-2011

LUC DELAHAYE
(France, 1962)
Nominated for various works: 2008-2011

RENA EFFENDI
(Azerbaijan, 1977)
Nominated for series: Still Life in the Zone, 2010

JACQUELINE HASSINK
(Netherlands, 1966)
Nominated for series: Arab Domains, 2005-2006

AN-MY LÊ
(United States/Vietnam, 1961)
Nominated for series: 29 Palms, 2003-2004

JOEL STERNFELD
(United States, 1944)
Nominated for series: When It Changed, 2007

GUY TILLIM
(South Africa, 1962)
Nominated for series: Congo Democratic, 1997-2006

—LensCulture