Sigma 20mm F1.4 DG HSM A - Nikon AF

20mm F1.4 DG HSM A - Nikon AF

Truly wide and truly fast, the Nikon F mount 20mm f/1.4 DG HSM Lens is a member of the venerable Art series of Global Vision lenses from Sigma and pairs a sophisticated optical design with a robust physical construction. Comprised of 15 elements in 11 groups, the lens design includes two "F" Low Dispersion (FLD) elements, five Special Low Dispersion (SLD) elements, and two aspherical elements to significantly reduce chromatic and spherical aberrations, as well as limit distortion for clean, sharp, and evenly illuminated imagery. A Super Multi-Layer Coating has also been applied to minimize surface reflections, flare, and ghosting for increased contrast and color accuracy. The wide focal length and consistent image quality make this lens especially suitable for landscape, interior, architectural, and astrophotography applications, while the fast f/1.4 maximum aperture deems it ideal for natural and low-light shooting. Complementing the optical performance is an equally adept Hyper Sonic Motor, which provides fast, smooth, and near-silent autofocus performance. This focusing motor also enables full-time manual focus override at any time just by rotating the focus ring for refined manual control and focusing as close as 27cm. The lens barrel is constructed using a Thermally Stable Composite material, which supports working in a wide variety of temperatures and conditions, and the lens mount is constructed from brass for long-term durability and mounting accuracy. Additionally, this lens is also compatible with the optional Sigma USB Dock for fine-tuned control over focusing parameters and other lens characteristics. Lens Type: Wide-Angle Prime Focal length - wide (mm): 20 Focal length - tele (mm): 20 Max aperture – wide: 1.4 Max aperture – tele: 1.4 Minimum aperture: 16 Minimum focus distance (m): 0.27 Sensor Format: FX/DX Lens mount: Nikon AF Lens elements: 15 Lens groups: 11 Aperture blades: 9 Filter thread (mm): Size: 90.7 x 129.8mm Weight (g): 950