Saturday, July 6, 2013

Exposure Guide Infographic: Road to Exposure

Exposure is one of the primary building blocks of photography, but seldom is it so clearly explained as in this infographic.  Each portion of this infographic explains the three basic components of exposure: shutter speed, ISO, and aperture.

Shutter speed or exposure time is the effective length of time a camera's shutter is open.  The total exposure is proportional to this exposure time, or duration that light is reaching the film or image sensor.  In optics, an aperture is a hole or opening through which light travels.  More specifically the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.  Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measure on various numerical scales, the most recent being the ISO system.  A closely related ISO system is used to measure the sensitivity of digital imaging systems.

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by Richard S - Dakota Visions Photography, LLC