The EF 100mm f/2.8 Macro USM offers excellent picture quality and close-up magnification up to life size (1:1). Because of the 100mm focal length and aperture size, you can shoot from further away and let more light through while keeping more than a fraction of the flower in view. It’s easy to get drawn to the striking details, like creases on the petals and the vivid yellow outline of the pollen. The silent and high-speed autofocus also means you can get up close to take a picture of an insect without scaring it away. Convenient operability is achieved with the easy full-time manual focus, ideal for subtle adjustments to the focus position.