Lou Dematteis is an extraordinary social documentarian, photographer and filmmaker. He has been taking photographs of the Mission District since the 1970s, capturing the low-rider scene of that era, and being at the first Carnavals and leaving us a stunning visual record. He has also covered the Nicaraguan Revolution into the mid-1980s, the depradations of the multinational oil industry in the Amazon, and more recently has been making movies, with his “The Other Barrio” capturing the current displacement crisis in the Mission in a distinctly San Francisco noir tone.