Shutter Speed, ISO & Aperture

After our project launch on Monday, Karl gave us a 10 minute tutorial on the basics of using a DSLR camera. Today there was a workshop with Adrain at 1pm on the same topic and once arriving home, I recapped everything by watching these two videos:

  • The ISO is about the sensitivity to light whilst taking the photo. A lower ISO gives you smoothness and richer colours.
  • The aperture is the control over the size of the iris in the lens, and it contributes to the photo’s depth of field. Phone cameras have a wide depth of field, so everything in the background and foreground is in focus.
  • Aperture is controlled by an F-stop number and the lower it is, the more open the iris is. For example, an F-stop of 1 or 1.5. The more open, the more shallow depth of field there is. More light means the background is more blurry. A higher F-stop produces a sharper background.
  • The shutter speed controls how long the film is exposed to light. A longer shutter speed of about 6 seconds is ideal to capture motion over a length of time, like a light trial in traffic overnight. Fast shutter speeds are best in sunny weather.

 

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All three features of the DSLR camera must be used in perfect balance, as depicted in these diagrams, in order to produce the most satisfactory photograph.

 

 

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