Expressive power meets optical excellence
A true all-round optic that is ideal for portrait, wedding, street, landscape and family photography. Improving on the already impressive 50mm F1.4 DG OS HSM lens for DSLR cameras, the SIGMA 50mm F1.4 DG DN for mirrorless delivers exceptional expressive performance to help photographers achieve striking and characterful images in remarkable detail. With the fast HLA (High-response Liner Actuator) motor, fast, quiet and precise AF can be achieved for both stills and video, with creative bokeh thanks to the exceptional F1.4 aperture.

Perfect for portraits and low-light photography
A fast prime lens that boasts an ultra-wide aperture of F1.4, making it ideal for low-light photography such as concerts, interiors and weddings. It also delivers a very shallow depth-of-field for background blur, which is perfect for creating stand-out portraits. The bokeh is smooth and attractive, and thanks to the lens’ 11 diaphragm blades, the out-of-focus highlights are nicely rounded, even when working wide-open at F1.4.

Outstanding optical performance
Thanks to improvements in optical design technology, the SIGMA 50mm F1.4 DG DN delivers sharp results across the entire frame, particularly towards the periphery. The lens is constructed of 14 elements in 11 groups, including one SLD (Special Low Dispersion) element and three aspherical elements which delivers significant improvements to controlling sagittal coma flare and effectively suppressing various aberrations such as astigmatism and field curvature, which cannot be corrected digitally.

Ultra-fast AF motor for stills and video
Never miss focus with the outstanding HLA (High-response Linear Actuator) autofocus motor. It ensures fast, accurate and near-silent focusing, and despite the lens’ ultra-wide aperture, exceptionally fast-tracking performance. Due to the redesigned motor, the lens includes a single double-sided aspherical element as the focusing lens that can be rapidly moved by the HLA motor.

Compact, robust design
The combination of redesigned optics and the HLA motor allowed the lens to be designed from the ground up, reducing the weight and improving the lens construction. With a dust- and splash-resistant structure, a rubber seal around the mount, and a water- and oil-repellent coating on the front-element, the 50mm F1.4 DG DN | Art is suitable for use in difficult shooting conditions. The outer barrel is constructed of TSC (Thermally Stable Composite), which has a similar thermal expansion rate to aluminium. This means the metal inner barrel and the TSC outer barrel behave in a similar way as temperatures change, ensuring a consistent performance in all environments. Both materials are very light, with the lens weighing just 670g approx.

Advanced feature-set designed for professional use
The lens barrel is equipped with a range of useful functions. As well as a manual aperture ring, the lens has an Aperture Ring Click switch, which allows users to switch between stepped, third-stop aperture increments and a smooth, click-free action. This is particularly useful for videographers who may want to use the aperture to adjust exposure seamlessly while filming. The aperture ring can be locked with the lock switch.

A customisable AFL button found on the side of the lens barrel can be customised to perform a range of different functions (depending on camera model). It also features a Focus Mode switch, a rubberised focus ring with a smooth, fluid-like movement, and a robust, petal-type lens hood with lock button. The hood also has a rubberised grip for easy attachment and removal.