1) What’s Shutter Speed and Why Does It Matter?
Shutter speed measures the length of time that the shutter stays open to let light through the aperture and fall on the sensor that records your image. It’s like opening and closing the blinds to let light in—or keep it out.
Whenever you take a photo, the camera performs two functions:
2) It opens up the aperture to the correct size for that exposure
b) It removes the cover from in front of the sensor to allow light to reach it.
Once the exposure time is completed, the camera moves the shutter back in front of the sensor, blocking more light from reaching it.
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