learn and explore 41 iso

Learn & Explore Series Episode 41

"Understanding the most from ISO"

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Did You Know?

Some high-end digital cameras have ISO settings as high as 204,800.

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Did You Know?

Whenever the ISO is doubled, half as much light is required for a correct exposure.

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Did You Know?

The progression of ISO numbers is expressed by the power of two: 100, 200, 400, 800, 1,600, 3,200, 6,400, etc.

Special Thanks to
Industry Expert: William Benson
Chicago Photography Academy

Questions covered in the above interview:

  1. What is the full name of ISO and what does it mean?
  2. Is ISO the same as ASA in film photography?
  3. Why is ISO often defined as sensitivity?
  4. What is the relationship of ISO to aperture and shutter speed?
  5. Why are aperture and shutter speed the first exposure settings a photographer should adjust before changing ISO?
  6. What is the “standard” ISO range?
  7. Why must a higher ISO be selected when the light is low or a faster shutter speed is required?
  8. Why is a higher ISO number required when shooting sports or action indoors?
  9. What is digital noise and how does it relate to ISO?
  10. How does the size of the pixels on a camera’s sensor affect the ISO number selected and the amount of digital noise?
  11. What is Auto ISO and how does it help the photographer?
  12. What is the advantage of setting a slower ISO for a photo with a narrow depth of field, such as a macro image?
  13. What is the best ISO setting for landscape photos?
  14. How does ISO affect bokeh?
  15. Why is the quality of the same photo taken with different digital cameras different at the same ISO setting?