Andy Warhol Photography is probably secondary art form next to his famous screen printing works. He picked up camera later in life and was known to carry it around everywhere. Similar to how we carry cameras in our pockets today, he was able to capture images of his friends, his surroundings, celebrities and situations from daily life. kind of like what everyone is doing today when they document their lives for display on vairous social media sites.
I've visited Andy Warhol exhibit in Los Angeles several times in my life. It's like being in another universe- a quick travel back in time, which offers a glimpse of magical reality of people places and a rich portrait in evolution of american culture.