Sigma 40mm f/1.4 DG HSM Art Lens (Nikon F)

The Sigma 40mm f/1.4 DG HSM Art Lens delivers cinema-grade precision with its wide-normal focal length and exceptional optical engineering. The luminous f/1.4 aperture enables striking subject isolation and excels in low-light environments. Advanced glass elements—including low-dispersion and aspherical components—work in concert to suppress spherical and chromatic aberrations, yielding superior edge-to-edge definition. A Super Multi-Layer Coating system effectively suppresses reflections and internal flare, preserving contrast and color fidelity even under demanding lighting. Built to exacting standards, this lens combines technical sophistication with practical versatility for discerning photographers.

Engineered for responsive autofocus performance, this lens incorporates a Hyper Sonic Motor that delivers rapid, silent focusing with seamless manual override capability. The robust brass bayonet mount ensures precise alignment and structural integrity while incorporating a protective seal against environmental contaminants. A nine-blade circular diaphragm renders exceptionally smooth bokeh transitions, enhancing the aesthetic quality of out-of-focus areas and complementing the lens's shallow depth-of-field capabilities.

Key Features:

• As part of the Art line within Sigma's Global Vision series, this lens is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications.
• Short-normal prime is designed for FX-format Nikon F-mount cameras, however is also suitable for DX models where it provides a 60mm equivalent focal length.
• Impressively bright f/1.4 maximum aperture is well-suited for working in low-light conditions and also provides greater control over the focus position when using shallow depth of field techniques.
• Three F Low Dispersion (FLD) and three Special Low Dispersion (SLD) elements are featured in the optical design, and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy.
• One aspherical element is used to help limit distortion and spherical aberrations and also contributes to greater overall sharpness and accurate rendering.
• A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions.
• Rounded nine-blade diaphragm contributes to a smooth and pleasing bokeh quality.
• The integrated HSM (Hyper Sonic Motor) realizes quick and quiet autofocusing, which is further complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time.
• Specialized electromagnetic aperture mechanism provides greater exposure control stability that is especially beneficial when working with fast continuous shooting rates.
• The bayonet mount is constructed from brass for ensured accuracy and durability. Additionally, rubber sealing is incorporated in the mount design to render it dust- and splash-resistant.
• Protective coating has been applied to the front element and is both water and oil-repellent to aid in cleaning.
• This lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware.