The document discusses Alec Soth's approach to portraiture photography on location. It focuses on two aspects: camera controls and available light, as well as interaction with subjects. Soth is able to make his subjects feel comfortable, allowing him to capture candid moments. The document also provides tips for location portraiture, including using a shallow depth of field to throw the background out of focus, adjusting the ISO to allow for higher shutter speeds, and manually focusing on the subject's eyes. Using a tripod and experimenting with different focal lengths and compositions is recommended.