This document provides a summary of key concepts in photography, including: 1) There are three main ways to control light in photography - aperture, shutter speed, and ISO. Aperture controls how much light enters the camera, shutter speed determines how long light is let in, and ISO sets the camera's light sensitivity. 2) Other important photography concepts covered include depth of field, which is how much of the photo is in focus, as well as the five tools that great photographers use - light, composition, portraiture, action shots, and capturing the moment. 3) Guidelines for photo ethics and determining whether to publish potentially sensitive photos are discussed, focusing on issues like privacy, shock value, and