The Sigma 50mm f1.4 DG HSM Art is a high-performance lens joining Sigma's Art line of the Global Vision series. Ideally suited to photography and video, this standard fixed focal length lens uses SLD (Special Low Dispersion) glass and Sigma's Hyper Sonic Motor (HSM) system to achieve fast and silent autofocus, as well as high resolution and exceptional rendering performance, even near the edges of the image. In addition, the lens firmware and adjustment settings such as focus can be updated using the Sigma USB Dock (sold separately). Key Features - High-performance fixed focal length lens with fast f1.4 aperture - Part of Sigma's Art line of the Global Vision series - Aperture range: f1.4–f/16 - Creates attractive bokeh - Super Multi-Layer coating reduces flare and ghosting - Hyper Sonic Motor (HSM) ensures smooth and silent focusing - Minimum focusing distance: 40 cm - Lens construction: 13 elements in 8 groups - Suitable for full-frame and APS-C DSLRs - Compatible with the optional Sigma USB Dock The Art line offers a high level of artistic expression Sigma organises all its interchangeable lenses into three product lines: Contemporary, Art and Sports, each with a distinct concept. Designed with an emphasis on sophisticated optical performance and abundant expressive power, our Art line offers a high level of artistic expression. With exceptional rendering performance that meets high standards, they are perfect for landscapes, portraits, still life, close-ups and candid photography, as well as for the type of photography that unleashes the inner artist. Ideal for studio photography, they offer equally rich expressive possibilities for capturing architecture, starry skies and many other scenes. Exceptional rendering performance Using the expertise and the latest design technology accumulated through previous developments, it carefully corrects aberrations and achieves high resolution and exceptional rendering performance, even near the edge of the image. Combining high resolution and beautiful bokeh While pursuing a high level of resolution at the focal point, the bokeh in front of and behind the focal point is carefully maintained to produce a smooth rendering. Aberrations, including sagittal coma and colour distortion that affect image quality, are carefully corrected. From maximum aperture, a high-definition rendering free of blur is achieved. Furthermore, by ensuring minimal vignetting and avoiding colour fringing around the front and rear of the focal point, it also achieves natural bokeh. Excellent sagittal coma correction It is ideal for a large-aperture standard lens to have high rendering performance from maximum aperture across the entire image. For example, the moulded aspherical lens elements offer excellent sagittal coma correction. It is perfect for astrophotography and shooting illuminations thanks to the reduction of blur on point light sources near the edge of the image. It also creates attractive bokeh in portraits and indoor shooting. Axial chromatic aberration correction For axial chromatic aberration, which is difficult to correct even during image processing, SLD (Special Low Dispersion) glass elements are incorporated, ensuring high image quality across the entire focus range. The lens delivers sharp, high-contrast image rendering. Minimised distortion It is not possible to compensate for distortion simply by changing aperture values. Therefore, the lens development stage was vital to ensuring minimised distortion. The "Sigma 50mm F1.4 DG HSM" positioned each glass element to optimise the power arrangement at each position, and succeeded in minimising distortion. Rich peripheral brightness It ensures very rich brightness in peripheral areas, which can be a common problem for a large-diameter lens. By positioning large elements in the front group, it has improved efficiency at large apertures. As it is capable of minimising vignetting, a very clear representation across the entire image is assured. Designed to minimise flare and ghosting Flare and ghosting were carefully measured and monitored from the lens development stage to establish an optical design resistant to strong incident light such as backlighting. The Super Multi-Layer coating reduces flare and ghosting and provides sharp, high-contrast images even under backlit conditions. Minimum focusing distance of 40 cm The lens incorporates a floating system that adjusts the distance between lens groups during focusing, thereby reducing the amount of lens movement required. This enables a minimum focusing distance of 40 cm and a maximum magnification ratio of 1:5.6. As there is less variation in aberration at different shooting distances, the lens offers high rendering performance across the entire focus range. The Hyper Sonic Motor ensures high-speed autofocus The HSM (Hyper Sonic Motor) ensures a quiet and fast autofocus function. By optimising the autofocus algorithm, smoother autofocus is achieved. It also enables a full-time manual focus capability that allows sensitive focus adjustment simply by turning the focus ring. New customisation option added to the "Sigma USB Dock" With the optional Sigma USB DOCK and the dedicated special software "Sigma Optimisation Pro", you can update your lens firmware or adjust focus points by attaching this lens to a Sigma USB DOCK connected to a computer.