Exposure Triangle

Every photographer needs to learn the “exposure triangle” of ISO – Aperture – Shutter.

For a brighter picture you can do any of three things:

  • Higher ISO
  • Lower “F-number”
  • Slower shutter speed

For a darker picture you can do the opposites:

  • Lower ISO
  • Higher “F-number”
  • Faster shutter speed

Those are the only ways.  Whatever mode you use, whatever compensation you use: these only use the mechanisms above.

So it is best to start off in manual mode, with auto ISO disabled. If you are not familiar with the above, start today: manual, auto ISO disabled, and go crazy. Try – and do not confuse exposure (“how bright an image is”) with colour, focus, or blur.


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