The Sigma 100-400mm f/5-6.3 DG DN OS Contemporary Lens is an ultra-telephoto zoom lens, being the first of its size designed for Fujifilm X mount cameras. The lens is engineered to deliver outstanding optical performance and a wide variety of functionality in a compact construction, helping you to achieve really lightweight shooting wherever you travel.

Regardless of where you find yourself, whether it be out in the wildlife, or at sports events, the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary Lens ensures edge-to-edge high-resolution and high-contrast image quality throughout its entire focal range. Some professional features include a short flange back distance - allowing the lens to achieve a supreme combination of optical performance and compactness; an advanced stepping motor that is carefully designed to help achieve both phase-detection AF and contrast AF; and a lens construction that consists of a variety of specialised elements, that includes 16 groups and 22 elements: one FLD and four SLDs that's used for the effective correction of aberrations and distortions.
The lens also consists of a full range of functionalities that enables smooth and easy ultra-telephoto shooting, all thanks to its powerful stepping motor optimised by the latest algorithm; a powerful Image Stabilisation (OS) of four steps built into the lens; an AFL button that allows you to assign select functions on the camera side; a focus limiter switch that enables optimising of the AF range; a Zoom lock switch; an OS switch that allows you to switch between Mode 1 for general photography and Mode 2 for motor sports or any other applications that involves panning.