An Exploration of Light

Camera Functions: 

  • Sensitivity, film or sensor.
  • Exposure mode (M,A,S,P – Nikon), (M,AV,TV,P – Canon)
  • Focus.
  • Compose, visualise and capture.

Taking a Photograph:

  • Film speed (light sensitivity) ISO, ASA.
  • Shutter Speed (time) seconds.
  • Aperture (Size of diaphragm) f-
  • Exposure reading/ check.
  • Focus (auto or manual)
  • Compose, frame and capture.

Shutter and aperture are inversely proportional which means that as you increase one you must incrementally decrease the other. These increments are what photographers call ‘stops‘. A stop can be aperture, shutter speed or ISO. i.e. 1/60 – 1/125 is equal to one stop. 400 ISO – 800 ISO is equal to one stop. F5.6 – F8 is equal to one stop.

  • At 200 ISO, F56 @ 1/125 is the same as f8 @ 1/60.

A photographer adjusts the ISO, aperture and shutter speed to suit the general light level.

  • ISO is set to suit the general light level.
  • Aperture determines the depth of field.
  • Shutter determines the capture of movement.
  • You decide what the priority is.

Aperture Priority is when you set the aperture you require and the camera selects the correct shutter speed. This is great for:

  • Portraits, where you want to control background sharpness.
  • Shots where you want to emphisise small detail.
  • Creating soft moods.

Shutter Priority is when you set the shutter speed you require and the camera selects the correct aperture. this is great for:

  • Freezing or blurring motion.
  • Capturing action.
  • Making sure you don’t get camera shake.

Programme is for when you just want ti snap away with little thought to settings.

Manual is when you have time to concentrate on accurate expire for maximized capture quality,

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