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Understanding Exposure: Aperture, Shutter Speed, and Depth of Field Explained

Exposure refers to the amount of light captured by a camera, controlled by the aperture and shutter speed. Aperture influences depth of field, determining how much of the scene appears sharp. A wider lens like the 35mm captures a broad perspective, while distance affects depth of field; closer subjects show a lower depth, and distant subjects display greater depth. Smaller apertures (higher f-stop numbers) yield a deep depth of field, while larger apertures (lower f-stop numbers) create a shallow depth. Key factors include aperture, distance to subject, and focal length.

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Understanding Exposure: Aperture, Shutter Speed, and Depth of Field Explained

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Presentation Transcript

  1. What is exposure?

  2. Exposure is… • the AMOUNT OF LIGHT (controlled by the aperture) that is captured over a SPECIFIC AMOUNT OF TIME (controlled by the shutter speed).

  3. Aperture

  4. What are the apertures?

  5. Depth of Field - Distance that appears sharp between the subject and background

  6. Focal Lens • Distance created by lens

  7. The lens this class uses is • 35mm • Captures a fairly wide angle

  8. The further away your camera is from the subject, the greater the depth of field. • Higher f-stop numbers obtained by using smaller apertures produce deep depth of field.

  9. The closer your camera is from the subject, the lower the depth of field. • Lower f-stop numbers obtained by using larger apertures produce low depth of field.

  10. Bottom Line: • Depth of field depends on three factors: • aperture, • distance to subject, • focal length.

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