Sigma 28-45mm F1.8 DG DN | A | Sony Fit

3 YEAR SIGMA WARRANTY

The SIGMA 28-45mm F1.8 DG DN | Art is the world’s first full-frame zoom lens with a constant maximum aperture of F1.8, delivering sharpness and clarity comparable to that of a prime lens.

Already the pioneer of unique, large-aperture zoom lenses including the SIGMA 18-35mm F1.8 DC HSM | Art and the SIGMA 24-35mm F2 DG HSM | Art, SIGMA introduces another fast, portable and versatile tool to its Art lineup.

In addition to its unprecedented brightness, the SIGMA 28-45mm F1.8 DG DN | Art delivers sharpness and clarity comparable to that of a prime lens throughout its entire zoom range. Also equipped with fast and precise AF and superior operability, this innovative optic turns a new page in the history of zoom lenses and their creative possibilities. It is a lens that will inspire full-frame film-makers, while bringing unparalleled versatility to stills photographers.

The lens’ fast F1.8 aperture allows full-frame camera users to expose hand-held in low light and produce beautiful bokeh, while enjoying the flexibility of a zoom. This unique optical achievement has been created through SIGMA’s accumulated optical design experience and advanced production technology at the company’s sole production base in Aizu, Japan.

By rights, such a fast zoom should be big and heavy, but while the lens’s rigidity and durability protect its sophisticated optical design, this is achieved at a weight of less than 1kg. What’s more, this reliable photographic tool uses a versatile filter size of φ82mm, meaning no compromise in portability or convenience.

A range of controls on the lens include an AF/MF switch, two customisable AFL switches, and switches to de-click and lock the aperture ring.

The lens is constructed from Thermally Stable Composite, a strong and light polymer that has a similar thermal expansion rate to the interior aluminium parts. This ensure that the lens behaves in a uniform and reliable way regardless of the temperature.

The 28-45mm F1.8 DG DN | Art uses SIGMA’s High-response Linear Actuator motor to control the focus group of lens elements. More powerful than a stepping motor, it ensures extremely rapid AF. It’s also very accurate and near-silent, and works perfectly with focus tracking systems.

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