Exposure and Aperture and Shutter Speeds….OH MY! - The Saga Continues

Last week we touched upon exposure – if you recall, I suggested thinking of it this way (as explained by the folks at Quickproguides.com):

The amount of light needed for proper exposure equals a full bucket of water and the tap used to fill the bucket with water is like the aperture or the opening on your lens. The duration of the camera's shutter is similar to the amount of time you'll need to leave the water turned on in order to fill the bucket; i.e., time water is on equals the time shutter is open. The "wider" the tap is open, the more water that will flow through the tap and into the bucket. This means the tap will only have to be open for a short amount of time. However, if the tap only has a "narrow" opening, water can only trickle into the bucket thus making the amount of time you have to leave the tap open much longer in order to fill the bucket, i.e. get the proper exposure.

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