Photographer Arthur Tress visited San Francisco in the summer of 1964 and ended up documenting a historic moment in time. Fifty years later, he’s returned to the city for a new series called SF 2014, which SFist readers are getting a first look at today.

Tress’ images from 1964, which capture San Francisco just after President John F. Kennedy’s assassination as its counterculture roots began to grow, were uncovered in 2009 and mounted into a major show at the de Young Museum in 2012.

A native New Yorker, Tress now lives in California and spends half his time in San Francisco at his home in Forest Knolls. You’ll recognize his neighborhood in some of these images as well as shots of what he calls the “hard sharp surfaces of the radically changing city.” He has chosen to format these images in diamond shapes, which he achieves by turning his Hasselblad Camera at a 45 degree angle.

Read more about Tress’ San Francisco 1964 series here.

Related: The Amazing Arthur Tress Shares His Dark, Surreal Photographs From The 1970s