This document discusses the key camera controls of shutter speed, aperture, and ISO that impact photographs. It explains that shutter speed controls the duration that the camera sensor is exposed to light, with faster speeds stopping action and slower speeds creating blur. Aperture refers to the opening in the lens and impacts the amount of light entering the camera as well as depth of field, with smaller apertures corresponding to larger f-numbers and greater depth of field. ISO adjusts the camera's sensitivity to light, with higher ISO numbers allowing for faster shutter speeds or smaller apertures in lower light conditions but also increasing image noise. The document provides examples of how different shutter speeds, apertures, and ISO settings impact photographs.