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Photographers Are Mathematicians by Addegbuyi(m): 11:44am On Jan 21, 2018
Despite what you thought about math in school, it does have applications in the real world. Photographers, for instance, use math to calculate a number of settings for their cameras, including shutter speed, aperture and focal length. Math is also applied to the composition of a photograph using the rule of thirds.
Step 1

Change the shutter speed to adjust how much light is allowed into the camera for a certain length of time. The camera's shutter speeds are calculated in fractions of seconds, which are usually 1/1000, 1/500, 1/250, 1/60, 1/30, 1/15, 1/8, 1/4, 1/2 and 1. Calculating the correct shutter speed to use is a matter of understanding geometric sequence. As you increase the speed from 1/1000 toward 1 second, each increase multiplies the amount of light entering the lens by a factor of 2.
Step 2

Determine the aperture to adjust the diameter of the camera lens. The larger it is, the more light is taken in by the lens. Aperture is measured by the diameter of the lens or mirror, while its ability to gather light is affected by its area. Understanding how to adjust the aperture of the camera telescope requires an understanding of the area of a circle, which equals pi times its radius squared.
Step 3

Calculate the relationship between the aperture and the focal length. A lens with a 28 millimeter focal length and an aperture of 14 millimeters photographing a 20 meter by 30 meter wall has an area four times greater than a 55 millimeter lens with the same aperture. Find the area of both shots by using the measurements of the wall, which equals 600 meters squared. The 55 millimeter lens has twice the focal length of the 28 millimeter lens and an area of 150 meters squared. The 28 millimeter lens has......
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