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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