Once a privilege reserved only for prime lenses, the F1.8 maximum aperture allows full-frame camera users to expose handheld in low-light conditions and produce beautiful bokeh effects, while still enjoying the flexibility of a zoom. This exclusive optical achievement has been created through SIGMA’s accumulated optical design expertise and advanced manufacturing technology at the company’s sole production base in Aizu, Japan.

Using an internal zoom mechanism, the overall length of the lens stays constant when changing focal length or focus distance. This means the lens is easy to handle when shooting handheld, highly stable when mounted on a tripod or gimbal, and more resistant to dust and water contamination.

The minimum focusing distance is a consistent 30cm across the entire zoom range, with a maximum magnification ratio of 1:4 at the telephoto end, offering excellent close-up shooting capabilities. As well as offering accurate focus in tight spaces, the lens can therefore be used close to a subject without compromising sharpness when zooming.

By rights, such a fast zoom should be large and heavy, but whilst the lens' rigidity and durability protect its sophisticated optical design, this is achieved at a sub-1kg weight. Additionally, this reliable photographic tool uses a versatile filter size of φ 82mm, meaning no compromise in portability or practicality.