Camera Aperture Definition

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what is open?

I'm not too educated in cameras, so i need a definition silent.

Openness is the name of adjustment hole that allows light into the camera http://www.shortcourses.com/images/b4ch1/aperture.jpg known as Fnumbers, where a small hole is a high number, f22, and a large hole is a small number, f3.4. aperture is useful for a lot of light on the camera when you need a fast shutter speed or decreasing the light entering the camera when it is necessary to leave the shutter open for a while. The greater use of openness, however, is the depth of field, which is essentially how far the camera can see in relation to what is focusing on. If you have the aperture open wide the camera can see only short distances, and what is front of or behind the camera at any distance is quite blurry. the smaller you make the opening, further than the camera can see Beyond its main focus point. http://www.photocourse.com/itext/DOF/

Photography and Film Tips – How to get a Shallow Depth of Field

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