Shutter speed

In Techniques

Shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera´s shutter is open when taking a photograph. 

How does it work? 

The camera´s shutter speed, the lens´s aperture, the Film Speed, and the scene´s luminance together determine the amount of light that reaches the film or sensor. Exposure value is a quantity that accounts for the shutter speed and the f-number. Once the sensitivity to light of the recording surface (either film or sensor) is set in numbers expressed, the light emitted by the scene photographed can be controlled through aperture and shutter-speed to match the film or sensor sensitivity to light. 

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