Portraits
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Portraits

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Portraits Portraits Presentation Transcript

  • Depth of Field & Portraits
  • Depth of Field
    • What is depth of field?
      • Depth of Field is the area that is in focus within the picture
      • This includes the area in front of your subject and the area behind your subject that is in focus
    • What does Depth of Field look like?
      • In the following photographs we will see three photographs taken from the identical viewpoint
      • See if you can identify the differences between them
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  • What is the difference between these photographs? How do we describe the difference?
  • How do we control depth of field?
    • Think back to the Project Pinhole what did we do?
      • We used three different aperture sizes
    • How did the aperture sizes change the overall focus of the image?
      • The smaller aperture gave us …
    • How do you control the size of the aperture on your camera?
      • The aperture ring or button of course
  • Aperture
    • When we talk about the size of an aperture on a camera how do we talk about it?
      • We refer to them as F-stops.
    • What is the normal range of F-stops?
      • 2, 3.5, 4, 5.6, 8, 11, 16, 22
    • Which one is the larger aperture?
  • Explanation of F-stops
    • Why is a large aperture expressed as a smaller number and a smaller aperture as a large number?
      • F-stops are a ratio
      • They express the diameter of the aperture compared to the length of the lens’ focal length
      • So F2 means that the aperture diameter is ½ the length of the lens
  • Here is a chart that explains it concisely
  • How can it affect your portraits
    • http:// www.andylim.com/photo/depthoffield.htm
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