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Depth of Field

  • Depth of Field is basically: How much blur can be allowed until it becomes objectionable?
  • Zeiss formula for Circle of Confusion: c = d/1730, d is the size of the image sensor

The value 1730 is by measurement using a 35 mm camera, but it can change.

  • Longer focal length: lower DoF
  • Larger aperture: lower DoF
  • Larger distance between subject and background: lower DoF

Analysis by Math

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