Robert Rosen is a portrait photographer who took thousands of snaps of the tawdry Sydney social scene of the 1970s, 80s and 90s. As a 'social' photographer he is particularly identified with the middle decade, during which he was ubiquitous at parties and balls. Tiring of the veneer of the partygoer, Rosen has recently produced a series of portraits of well-known identities, such as Jenny Morris and Hugo Weaving, naked with their siblings. The exhibition Siblings has toured widely throughout Australia in the past three years. Rosen's nickname, 'Twogun', derives from his occasional practice of firing off two cameras at once.