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How Cameras Work  Digital Photography
In a Digital SLR:
As the shutter is released…
With a compact camera…
DSLR
Terms        6
7
Leaf Shutter
Focal Plane Shutter
How an image is recorded
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How cameras work

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  • What you see is what the lens sees. The mirror is hinged to move out of the way when the shutter is opened.
  • Note how the mirror moves upward to expose the sensor.
  • You look through the viewfinder and see a slightly different view than the lens.
  • (Walk through the process again and end with looking at the shutter and sensor.)
  • These are found in the lens itself. The individual leaves must cycle open and closed, so it takes a bit longer to cycle through an exposure. This is the type shutter found in compact cameras.
  • This type of shutter is usually made of two curtains that follow each other across the sensor. This shutter is found in the body, not the lens of SLR’s.
  • First the array of light-sensitive sensors turns the image into a mosaic of picture elements, or pixels, with luminance (brightness) and chrominance (color) information. Next the photosensors produce a single stream of electrical signals that are converted by integrated circuitry into digital data. The digital data is next taken apart by powerful computer chips and software to extract the color and brightness data in order to construct the final image. Last the circuitry sends the image data to the electronic memory card. Some cameras use a temporary storage which speeds up the picture taking operation.
  • Transcript of "How cameras work"

    1. 1. How Cameras Work Digital Photography
    2. 2. In a Digital SLR:
    3. 3. As the shutter is released…
    4. 4. With a compact camera…
    5. 5. DSLR
    6. 6. Terms 6
    7. 7. 7
    8. 8. Leaf Shutter
    9. 9. Focal Plane Shutter
    10. 10. How an image is recorded
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