Sigma 70mm DG Macro Lens for Canon EF Single Focus Art SLR Cameras f/2.8 Mount, Telephoto, Full-Frame

In addition to two FLD glass elements and two SLD glass elements, one glass element with a high refractive index and high anomalous partial dispersion is used to thoroughly correct on-axis chromatic aberration.In addition, two aspherical lenses are used to improve resolution around the minimum focusing distance. The focus ring is mechanically connected to the focus drive unit using a by-wire system. The newly developed coreless DC motor is controlled by an algorithm, reducing drive noise and achieving excellent focus speed. The use of a super multi-layer coating reduces flare and ghosting, achieving high-contrast images even when shooting in backlight. Canon EF mount 70mm F2.8 Single focus Macro Telephoto SLR full size