Final answer:
The speed of a camera system is denoted by the f-number, which is a measurement of the amount of light reaching the image plane. As the f-number decreases, the camera can gather more light from a larger angle.
Step-by-step explanation:
The speed of any given camera system is denoted by the f-number. The speed of a camera system is denoted by the f-number, which is a measurement of the amount of light reaching the image plane. As the f-number decreases, the camera can gather more light from a larger angle. In photography, the f-number is a measurement of the amount of light per unit area reaching the image plane.
It is determined by the ratio of the focal length of the lens to the diameter of the aperture controlling the light into the lens. As the f-number decreases, the camera is able to gather light from a larger angle, resulting in wide-angle photography. However, a greater f-number means less light reaches the image plane.