Digital Cameres: shutter speed, ISO and aperture explained

Posted on Saturday, May 20 2006 @ 09:11 CEST by Thomas De Maesschalck
Photography Jam explains some of the basic elements of cameras:
Put simply, a camera consists of a light-tight box that stores a light-sensitive device (either a film or a digital sensor), a lens that magnifies and focuses the image onto that light-sensitive device through a hole in the box (called the aperture) , and a shutter that opens and closes when you press the shutter release, exposing the film or sensor to the light; this is why a picture is sometimes called an exposure.

The amount of light entering the camera depends on the amount of light in the scenes that you’re photographing. A bright sunny cloudless day has more available light than a cloudy one, which in turn has more light than an indoor scene lit by tungsten lighting. To make the picture look right, we have to expose the film or sensor to the right amount of light. Too short, and the image will be dark, or underexposed..
You can read it over here.


About the Author

Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.



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