Saturday, March 22, 2008

The Eyes Have It!

One great way to relate to how your camera handles exposure is to think about how your EYES handle light.

Your RETINA is like the camera's sensor... it receives the light.

Your PUPIL is like the actual hole in the lens, the aperture, that light travels through to get where it's going.

Your IRIS is like the mechanical part of the lens that expands or contracts to let in more or less light through the PUPIL.
A camera lens aperture, acting like the IRIS of your EYE, affects the intensity or brightness of the light that strikes the sensor.

Your EYELID is like your camera's shutter - it affects the length of time, or duration that the light may enter your EYE.
Likewise, the shutter in your camera determines how long the light may strike the sensor.

Together, the aperture and shutter determine the exact quantity of light that strikes the sensor.

But... they do more than merely affect exposure!

Apertures (F/Stops) and shutter speeds help us with creative things, too.
We'll cover those as well.

Exposure Expose' is where these are all explained clearly and step-by-step.

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