Roadside shacks, garbage, circus wagons, subway riders and other ordinary folk: All were favorite subjects of Walker Evans, one of the 20th century's pre-eminent photographers.

Those images are among 400 of Evans' prints, paintings and personal items at a new exhibition at the San Francisco Museum of Modern Art.

Called the quintessential American photographer by museum director Neal Benezra, Evans influenced many others including Diane Arbus, Robert Frank and Lee Friedlander.

In this 1936 photo provided by the San Francisco Museum of Modern Art is the photograph by Walker Evans called "Allie Mae Burroughs," wife of a cotton sharecropper, taken in Alabama.

The exhibit was conceived as a 50-year retrospective highlighting the photographer's fascination with popular culture as a celebration of the beauty in everyday life.

The show includes signs and postcards from his extensive personal collection. To Evans, collecting was as important as photographing. A large photograph of his living room shows how he displayed signs like paintings above his fireplace.

He was most recognized for his Depression-era documentary work using an 8-by-10-inch view camera. Later he used a 35 mm and a Rolleiflex, and toward the end of his career, a Polaroid SX-70 camera.

His most famous photo, shot in 1936, was of Allie Mae Burroughs, wife of a cotton sharecropper in Alabama. Evans made four 8-by-10-inch exposures of Burroughs, the most famous showing her deepest sadness. The exhibit includes another version showing her smiling, along with Burroughs' recollections of Evans' visit with writer James Agee.

Evans, born in 1903 in St. Louis, studied in France and made his way to New York in the 1920s. Well-educated, he started as a writer but turned to photography, landing his first major exhibition in 1938 and building a 20-year relationship with Fortune magazine.

The show debuted at the Centre Pompidou in Paris. San Francisco is its sole U.S. venue, on view through Feb. 4.

Evans "deserved a large show to really explain the depth of his work," said Clement Cheroux, the museum's senior curator of photography. "Through his photos, he was trying to define what is the American vernacular. He was a proto pop artist."