The RF 100mm F2.8 L Macro IS USM is a truly versatile lens and a must-have for professionals, semi-professionals and photo enthusiasts who want to get real with macro, still life and portrait photography. The above-average magnification ratio of 1.4:1 is made possible by the lens' internal focusing and short flange focal length. It allows the capture of exceptional detail at close range. The focal length of 100mm at aperture F2.8 is suitable for impressive portrait shots.