Exposure Basics: Aperture and Depth of Field

Aperture decides how much of a scene is sharp, from a blurred background behind a portrait to a landscape crisp from front to back. These ten tutorials start with aperture priority as the beginner's mode, explain depth of field plainly, and show how to control what is in focus, blur backgrounds deliberately, avoid the diffraction trap at f/11 and beyond, and use focal length to shape a picture.