ISO 8039:2012规定了光学显微镜成像元件放大率的一系列值、公差和符号，并定义了许多成像元件及其应用的放大系统。

ISO 8039:2012 specifies a series of values, tolerances and symbols for the magnification of imaging components of light microscopes and defines a number of imaging components and magnifying systems to which they apply.