'Exposed' at San Francisco MoMA

Photographs snapped covertly (or without the subject's awareness) have an intimacy and authenticity that is difficult to stage. But they also pose unsettling questions about privacy and some of the camera's less salubrious uses, from pornography to stalking.

Exposed: Voyerism and the Camera, which is currently on show at San Francisco's Museum of Modern Art (SFMOMA) following its run at Tate Modern in London, features over 250 historical and contemporary photographs, films and video works by both unknown photographers and internationally renowned artists.

Investigating the shifting boundaries between seeing and spying, the private act and the public image, the exhibition challenges us to consider how the camera has transformed the very nature of looking and poses compelling and urgent questions about who is viewing whom, and why.