Cole Weston held his first solo exhibition in San Francisco in 1971, and his work had been featured in 60 exhibitions worldwide and collected by museums and galleries in the United States and Europe.

At age 6, Kim Weston took a group picture of his dad and two brothers, and with it embarked on a lifelong journey in photography.

"Dad gave me the rolling film. And I still shoot in film," he says.

As the only one of four children of his parents who picked up and decided to pursue a career in photography, Kim Weston says his choice was natural.

"It's also about the relationship between a dad and his son-just like my dad and uncle helping their dad in the darkroom. It was something we did for generations, now it's my son, Zach," says Kim Weston.

Zach Weston, 28, has been involved in photography for seven years.

"It's quite rare to have four generations pursuing the same art, photography," Kim Weston says.