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What is the physical change that is made to the camera when you adjust the shutter speed?

April 26, 2017camera cameras consumer electronics physical shutter speed

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What is the physical change that is made to the camera when you adjust the shutter speed?

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Shutter speed is one leg of the Exposure Triangle. The other two are ISO and f-stop (aka aperture). A look back in time to the “Sunny 16 Rule” will help you to understand the shutter speed-f-stop relationship. “Sunny 16” states: “On a sunny day, set your aperture to f16 and your shutter speed to 1/ISO.” So lets use ISO 100 and venture forth on this sunny day. ISO 100 f32 @ 1/25 sec. f22 @ 1/50 sec. f16 @ 1/100 sec. “Sunny 16” f11 @ 1/200 sec. f8 @ 1/400 sec. f5.6 @ 1/800 sec. f4 @ 1/1600 sec. f2.8 @ 1/3200 sec. If we’re shooting in Shutter Priority and change the shutter speed our camera will adjust the aperture to suit. If we’re shooting in Aperture Priority and change the f-stop our camera will adjust the shutter speed to suit. If we’re shooting in Manual then we’ll have to adjust the aperture if we change our shutter speed. If we change the shutter speed we’ll have to change the f-stop.