 While a member of the Modern Folk Quartet, Diltz became interested in photography, met The Monkees, played on some of their recording sessions, and took numerous photographs of the band, many of which have been published.His work also attracted the eye of other musicians who needed publicity and album cover photos.He was the official photographer at Woodstock, and at the Monterey Pop Festival and Miami Pop Festival, and has photographed over 200 record album covers.