aperture
The aperture stop of a photographic lens can be adjusted to control the amount of light reaching the image. It works with shutter speed and the aperture. A fast shutter will require a larger aperture to ensure a high light exposure, and a slow shutter will require a smaller aperture to avoid images being over exposed.
A device called a diaphragm usually serves as the aperture stop, and controls the aperture. Reducing the aperture size increases the depth of field.
The lens aperture is usually specified as an f-number. A lens typically has a set of marked "f-stops" that the f-number can be set to. A lower f-number creates a greater aperture opening which allows more light to reach the image.
A device called a diaphragm usually serves as the aperture stop, and controls the aperture. Reducing the aperture size increases the depth of field.
The lens aperture is usually specified as an f-number. A lens typically has a set of marked "f-stops" that the f-number can be set to. A lower f-number creates a greater aperture opening which allows more light to reach the image.