Understanding Aperture:

     Aperture is a technique on your camera that you use to let more or less light in depending on how large of an aperture number you are using. It is size of the opening in the lens is what your changing and its how much light you are allowing in. For example if you use a small number like 4.5, you are letting less light in and it can create a small depth a field or in other words blur effect in the picture. If you use a larger aperture number it lets more light in the camera, it will give you a large depth of field or it will make the whole picture clear and forced on everything. To get the best quality picture you have to make sure all your setting are set at the closest to 0. So after you change you aperture you change your shutter speed to help balance out the amount of light going into the camera. Along with the ISO which is also the sensors to the light to measure these other two tools.

Small  Aperture                    

      Large Aperture