Aperture

=Aperture=

Lens opening. The hole or opening formed by the metal leaf diaphragm inside the lens or the opening in a camera lens through which light passes to expose the film. media type="youtube" key="g5310BnZo8A" width="425" height="350"

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Article below is reprinted from [|Skip Henne Photography]

Therefore, if you have a camera that offers Manual Control, can use "depth of field" to help draw attention to the objects you consider important. Now to some other tips lenses...........
 * The aperture is used primarily for controlling the exposure ( the lesson on Exposure follows this page, be patient) but it also controls the "depth of field" ("depth of sharpness" would have been a better term.**
 * Words cannot explain this as well as visuals so take a look below at how different aperture settings can control the sharpness of objects in front of, and behind, the subject you are focusing on:**
 * [[image:http://photographycourse.net/wideopen.JPG width="225" height="189" caption="wideopen.JPG (6856 bytes)"]] || [[image:http://photographycourse.net/fEight.JPG width="253" height="212" caption="fEight.JPG (8388 bytes)"]] || [[image:http://photographycourse.net/stopdown.JPG width="256" height="212" caption="stopdown.JPG (7863 bytes)"]] ||
 * **"Wide open" .. f2.8 to f4.5** || **"Optimum" .. f8 or f11** || "Stopped down .... f16 to 32 ||
 * If the lens aperture is "wide open" the depth of field is very shallow... notice how the runner (below) is sharp and the other players are out of focus ||  || However, if you close the aperture all the way down objects in front of, and behind, will appear much sharper (see below). ||
 * [[image:http://photographycourse.net/duce%20td.jpg width="225" height="162" caption="duce td.jpg (25178 bytes)"]] || By keeping the aperture wide open (left) we give the runner a "3D" look. He stands out among the out-of-focus players and our eye is drawn to him. If we close the aperture down (right) more objects are in focus and the runner gets lost in the crowd. || [[image:http://photographycourse.net/mcnabb%20V51.jpg width="244" height="166" caption="mcnabb V51.jpg (31566 bytes)"]] ||

=Exposure= Please read this article on exposure and aperture http://www.andylim.com/photo/exposure.php