Shutter Speed
This is how quickly the shutter opens and closes. The longer the shutter speed, the more light gets into the camera. A short shutter speed will freeze things without much motion, so you can photograph fast moving things like cars or animals. A long shutter speed would capture movement, and the image would look blurred. This is useful to show movement or speed. A long shutter speed will show movement from the camera, even when you're standing still.
Aperture
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The aperture refers to the size of the iris (hole) within the lens. The bigger the hole, the more light gets into the camera. Aperture is measured in F-stops. A low number like F1.8 or F2.1 means a wider aperture. F16 would be a smaller aperture. A wider aperture (a low F-stop) means less of the image is in focus. It also means a faster shutter speed can be used.
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ISO
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ISO settings are about the light sensitivity of the digital chip or film. The higher the ISO the more sensitive the chip becomes, meaning that you can take a photograph when there is less light. However, at higher ISO settings an image is more likely to be affected by digital noise or grain (this can also be a desired effect). An ISO of 200 is the average daylight setting.
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Our own experiments!
Aperture, Shutter Speed & ISO
The Canon Challenge
The Canon Challenge made us practice our skills on the correct aperture, shutter speed and ISO for the perfect picture that was given. On the game we had to match every skill to the correct point so we could make the picture they wanted. Here's a link to the game.
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