What is the depth of field when all objects in the scene are rendered in sharp focus?

The depth of field refers to the range of distance within a photograph or a shot where the objects appear acceptably sharp. When all objects in the scene, from the foreground to the background, are rendered in sharp focus, this condition describes a deep depth of field. A deep depth of field typically occurs when a smaller aperture (higher f-stop number) is used, allowing more of the scene to be in focus.

In contrast, a shallow depth of field, as indicated by the first option, results in only a small portion of the image being in focus while the rest appears blurred. This is often used to isolate a subject from the background. The concept of variable depth of field refers to situations where the depth of field can change depending on focusing techniques or the aperture setting, while fixed depth of field implies a consistent focusing range, which doesn’t offer the same clarity for all objects in a frame. Therefore, when discussing sharp focus across all elements of a scene, deep depth of field is indeed the correct definition.