A measure of the magnification power of a given lens, based on the distance from the center of the lens to the film. Also known as simply the length of a lens. A longer focal length will produce greater magnification than a shorter length.
A measure of the magnification power of a given lens, based on the distance from the center of the lens to the film. Also known as simply the length of a lens. A longer focal length will produce greater magnification than a shorter length.