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Top 5 Tips to Better Photographs, Tip 3: Open Wide & Show Me Your Aperture
Joseph: 
Hello again everyone.  This is Kay's assistant, Joseph.  In today's tip we will look at the third (and last) technical area of your camera equipment that a little knowledge about will serve you well:
!!!!!Lens Aperture, Shutter Speed, and Depth of Field!!!!!!
Lens Aperture
The aperture of a camera lens is the size of the opening that allows light through the lens to strike the film (or digital sensors) when the shutter opens.  It is also called the f-stop, abbreviated f/. Every lens has a single, or multiple aperture settings.  Almost all good compact digital cameras and SLR lenses have multiple aperture settings.  In the days before digital, you turned a ring on the lens to change the aperture setting.  Now most cameras have a button or thumbwheel you can use to change aperture settings (usually the camera has to be in Manual, or "A"-Aperture Priority Mode to make these changes).
Here is a picture showing the size of some common lens apertures:   

!!!!!Yes, you are correct if you noticed SMALLER f/ NUMBERS MEAN LARGER APERTURE OPENINGS!!!!
 
So we call f/1.4 a LARGE APERTURE, and f/8 is a SMALL APERTURE! There are also f/11 and f/16 (very ... more

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