Example Concept: Depth of field is the range in a shot where objects appear acceptably sharp. A shallow depth of field, achieved with a wide aperture (e.g., f/1.8), isolates the subject by blurring the background, drawing focus to the subject. Conversely, a deep depth of field, achieved with a narrow aperture (e.g., f/16), keeps more of the scene in focus, useful for landscapes or scenes where the environment is as important as the subject.