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Chapter 2. The Elements of Exposure > The Fundamentals of Exposure

The Fundamentals of Exposure

Every camera uses three elements to control exposure: shutter speed, aperture, and ISO. Yes, your camera may have a wealth of other bells and whistles, but shutter speed, aperture, and ISO are at the heart of everything you do with your camera. They impact every photograph you make.

Shutter speed

Your camera has a shutter that blocks the light path from the film (if you’re shooting with a film camera) or the sensor (if you’re shooting with a digital camera). Every time you push the button to take a picture, you’re releasing the shutter. The shutter moves out of the way, allowing the light to make the photograph.


  

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