Aperture Control

Aperture is the opening through which light enters the image sensors. The amount of light falling on the image sensor is controlled by the aperture. Thus exposure of the image largely depends on the aperture. Larger the aperture is, exposure is also more. In digital cameras aperture and shutter speed are highly dependant. When the aperture is wide, the shutter speed is faster to avoid over-exposure. Similarly when the aperture is small, shutter speed is slower to avoid under-exposure. Aperture control is measured in f-stops depicted as f/2.8 or f2.8. Most digital cameras provide an aperture range from f2.8 thru f11. i.e. f2.8 will be a large aperture and f11 will be a small aperture.

A larger aperture will be helpful while photographing in low-light or during night. Also a larger aperture will focus on the subject and will blur the background.

A smaller aperture will be helpful in photographing moving objects. It will give a motion-effect to the subject. Also smaller aperture will provide a good depth of field.