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Photo 101 : Controlling Exposure < Previous | Next >
Determining exposure with shutter speeds and aperture
Let’s go back to our analogy of the water basin. In order to fill the basin with water, you can control the aperture and shutter speed.

If you want to fill up the basin with water more quickly (faster shutter speed), you can open up the tap more (larger aperture).

If you want to fill up the basin with water trickling out of a small tap opening (small aperture), you have to leave the tap running for longer periods of time (slow shutter speeds).

So for the last part of our theory lesson, you should understand that shutter speeds and aperture have an inverse relationship to maintain the same amount of light.
For example, if this photo is taken at f/11 and 1/60th second, you will be able to get the same exact exposure of light by setting the camera to f/5.6 and 1/250th second.
Photo taken f/11 and 1/60th second Photo taken f/5.6 and 1/250th second
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