Perfect Exposure

| November 8, 2018


Exposure can be defined as the quantity of light the sensor of the camera lets in. The magnitude of light is directly correlated with the brightness of the resulting picture. The opposite is also true; the amount of light let in is inversely proportional to the darkness of the picture. The shutter speed and aperture determine how much light is let in. The former is measured in fractions of a second so that typically you will see shutter speed measured as 1/125 or 1/50 and so on. This is defined as the amount of time the shutter opens in order to let in the light. To get a longer exposure means having a smaller denominator on the fraction of shutter speed. The larger the denominator, the shorter the amount of time given for light to get in. 1/20th of a second is a shorter time than 1/5th of a second. Therefore when you have a shutter speed of 1/20th of a second, the resulting picture will be darker than if you use 1/5th of a second shutter speed. A longer exposure produces a more blurry picture.

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