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Photography: 4 - ISO (Film Speed)

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A quick guide to film speeds and grain

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Photography: 4 - ISO (Film Speed)

  1. 1. International Standards Organisation (formally: ASA – American Standards Association)
  2. 2.  ISO (or Film Speed) in traditional photography refers to how sensitive film is to light
  3. 3.  Open www.camerasim.com  Take a photo using 100 ISO then take one at 6400 ISO  Because 6400 ISO is more sensitive to light the image will be over exposed  Try at different ISO settings – remember you’re not even touching aperture or shutter speeds
  4. 4.  ISO is the easiest of the camera settings to learn – just set it and forget it:  If it’s a bright sunny day – use 100 ISO:  If it’s dark and dingy – use 1600 or 3200 ISO  If you’re not sure use 400 ISO
  5. 5.  As you will be taking photos inside a building – where it will be dark – you should set your ISO to 1600+ before you start shooting
  6. 6.  As you increase the ISO setting you also increase the amount of noise (or grain) your photo will have:
  7. 7.  Before you start set your camera to 1600 ISO  Start in Shutter Priority mode and set to at least 1/60th  If necessary, wedge your camera against a wall when taking photos  Try to avoid using flash
  8. 8.  Before you start set your camera to 1600 ISO  Start in Shutter Priority mode and set to at least 1/60th  If necessary, wedge your camera against a wall when taking photos  Try to avoid using flash

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