Exposure is the action of letting a certain amount of light into the camera through the lens for a certain amount of time. The light then hits the camera sensor and the image is captured.
There are three basic elements to Exposure:
ISO - The Camera's sensitivity to light
Shutter Speed - The time (in seconds) that light is allowed into the camera
Aperture - How much light is allowed into the camera
We will learn about each of these elements of Exposure over the next few weeks.
Exposure Guide dot com
http://www.exposureguide.com/exposure.htm
Exposure Basics from Nikon
http://www.nikonusa.com/en/Learn-And-Explore/Article/fue0dnl6/a-basic-look-at-the-basics-of-exposure.html
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