Look through The Lens of Time : A Repeat Photography of Landscape Change in the Canadian Rockies, with two expert observers who have been examining landscape change in the Canadian Rockies for over twenty-five years - national park biologist Cliff White and Canadian Rockies historian Ted Hart. Working with historical photographs, White has retraced the steps of the original photographers and taken new shots in the same locales, a technique known as "repeat photography." Comparing these images side-by-side, White and Hart show the dramatic changes to the Rockies landscape that have occurred in the past 125 years.

This unique collaboration is illustrated with over 100 sets of striking "then and now" images covering terrain from Calgary and the foothills, through the Bow Valley, to Banff National Park, the eastern- and western-most slopes of the Rockies, and north to the Columbia Icefield and Jasper National Park. The Lens of Time is at once a showcase for the beauty of the Rocky Mountain landscape and a valuable source of information about ecological and cultural change in this world-famous region.

Cliff White is a biologist with Parks Canada, based in Banff, Alberta. A fourth-generation Banffite, he has a PhD in forest ecology from the University of British Columbia.

Cliff White's profile page

E.J. (Ted) Hart is the executive director of the Whyte Museum of the Canadian Rockies in Banff, Alberta. He has been actively involved in the archival and museological fields of Canadian Rockies history for nearly thirty-five years and has served as mayor of the town of Banff.

E.J. (Ted) Hart's profile page

• Short-listed, Alberta Book Publishing Awards, Trade Non-Fiction Book of the Year (Book Publishers Association of Alberta)
• Short-listed, BPAA Alberta Book Publishing Award for Trade Non-Fiction
• Commended, Banff Centre for the Arts Canadian Rockies Award