Image Exposure

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Image Exposure
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Exposure

• Exposure Intensity of Light (X) Time
• Intensity is controlled by the aperture
  (f/stop)
• Time is controlled by the shutter (shutter
  speeds)
• ISO sensors sensitivity to light

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Unit Of Measurement

• The unit of measurement used to measure light is
  called a Stop.
• Digital Cameras use 1/3 stops increments

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f/stops in 1/3 increments
f/4 f/6.3 f/10 f/16 f/25

• f/2.8
• f/4.5
• f/7.1
• f/11
• f/18
• f/29

f/3.2 f/5.0 f/8 f/13 f/20 f/32
f/3.5 f/5.6 f/9 f/14 f/22
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Full - f/stops
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Full f/stops either half or double 2X
- 1/2X
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Shutter speeds in 1/3 increments
1/30 f/80 f/200 1/500 1/1250

• 1/15
• 1/40
• 1/100
• 1/250
• 1/640
• 1/1600

1/20 1/50 1/125 1/320 1/800 1/2000
1/25 1/60 1/160 1/400 1/1000
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Full Shutter Speeds
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Full shutter speeds either half or double 2X
- 1/2X
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Manual Exposure Control
Gives you full control over your exposure! You
choose both the f/stop and shutter speed
f/4_at_1/60
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Histogram
Is a chart/graft that gives you precise exposure
control information
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Over-Exposure
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Under-Exposure