The Photo Lab
In The Photo Lab we take a deeper look into the science, math, and technical aspects of photography
Let's look back at our exposure triangle
01
shutter speed
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Controls the amount of time light is hitting the sensor
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Portrays motion in an image
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Longer exposures are susceptible to camera shake and blur
02
aperture
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Controls the diameter of the lens' aperture (hole)
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Determines the depth of field (DoF) in an image
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More DoF needs more light
03
iso
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Controls the sensitivity of the sensor
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Higher ISO, More Sensitive, Brighter Image
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Light ISO / Clear Image High ISO / Grainy Image
First let's discuss the shutter of a camera.
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We already know the shutter controls the amount of time light is hitting the sensor. But what exactly is a shutter? A shutter is a device that allows light to pass for a determined period of time, exposing the camera's sensor or film. There are two main kind of shutters in photography, mechanical shutters and electronic shutters. Mechanical shutters use a mechanical device that opens and closes to control the amount of light hitting the sensor. Electronic shutter operates by turning the cameras imaging sensor on and off to control exposure.
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These shutters usually gather light one of two different ways. Rolling or Total. ​
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Rolling shutters
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