3. Exposure Triangle

Image

ISO 200 • 1/8 sec. • f/11 • 160mm

ISO, Aperture, and Shutter Speed: Their Relationship to Each Other and Light

“A photographer must be prepared to catch and hold on to those elements which give distinction to the subject or lend it atmosphere.”

—Bill Brandt

Every image you make is influenced by light. Your camera meters the quality, quantity, and direction of the light to provide information that you can use to make an exposure that reflects your vision. Once you have the exposure information, it is up to you to decide the best combination of ISO, aperture, and shutter speed to best render that vision.

Your camera, left ...

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