Depth of Field is controlled by the basic function of Shutter Speed.

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The question asks whether Depth of Field (DOF) is controlled by the basic function of Shutter Speed.
Option 1: 'True' — This statement is misleading. While shutter speed affects exposure and motion blur, it is not the primary control of depth of field. DOF is mainly influenced by aperture (f-stop), focal length, and subject distance. In some extreme cases, very fast or very slow shutter speeds can interact with motion to alter perceived sharpness, but that is not DOF control in the optical sense.
Option 2: 'False' — This is the accurate choice. Depth of field is determined by three main factors: aperture size (smaller aperture = larger DOF, larger aperture = shallower DOF), lens focal length (shorter focal length yields deeper DOF for the same framing, longer focal length yields shallower DOF), and the distance to the subject (increasing distance increases DOF). Shutter speed mainly controls exposure and motion realism; it does not directly set the range of acceptable sharpness in front of and behind the focus plane.
Clarification on related concepts: if you change only shutter speed while keeping aperture, focal length, and distance constant, you will not change where the plane of sharpest focus lies or the extent of sharp region in front of and behind that plane. Conversely, altering aperture or distance will visibly change DOF regardless of the shutter speed. In summary, the statement is false because shutter speed does not control depth of field; it governs exposure and motion, not the optical range of sharpness.
Additional nuance: photographers sometimes adjust shutter speed for creative effects (motion blur) while separately tuning DOF with aperture and distance, illustrating that the two controls impact different aspects of the image quality.

COMM 2081 B01 Basic Photography Quiz

Depth of Field is controlled by the basic function of Shutter Speed.

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