The Sigma 20mm f/1.4 DG HSM ART lens, with Canon EF, Sony E, Nikon F and Leica L and Sigma SA mounts, is a member of Sigma's ART family characterized by advanced optical construction and robust design. The combination of low-dispersion FLD and SLD elements helps reduce chromatic aberrations, while a pair of aspherical elements, one of which is at the rear of the lens, further minimizes distortion and aberration. The optical design of 15 elements in 11 groups delivers consistent peripheral brightness and sharpness, even at a maximum aperture of f/1.4. A Super Multi Coating has been applied to the lens elements to reduce flare and ghosting.
It has an efficient hypersonic motor (HSM) that is fast, smooth and quiet. Nine rounded diaphragm blades contribute to a pleasing out-of-focus quality with shallow depth of field at maximum aperture.
The Sigma 20mm f/1.4 DG HSM ART lens, with Canon EF, Sony E, Nikon F and Leica L and Sigma SA mounts, is a member of Sigma's ART family characterized by advanced optical construction and robust design. The combination of low-dispersion FLD and SLD elements helps reduce chromatic aberrations, while a pair of aspherical elements, one of which is at the rear of the lens, further minimizes distortion and aberration. The optical design of 15 elements in 11 groups delivers consistent peripheral brightness and sharpness, even at a maximum aperture of f/1.4. A Super Multi Coating has been applied to the lens elements to reduce flare and ghosting.
It has an efficient hypersonic motor (HSM) that is fast, smooth and quiet. Nine rounded diaphragm blades contribute to a pleasing out-of-focus quality with shallow depth of field at maximum aperture.
The SIGMA 20mm F1.4 DG HSM ART lens incorporates a 59mm diameter double aspherical lens to provide an ultra-wide-angle lens with a focal length of 20mm and F1.4 brightness. Designed for high-resolution digital cameras, this high-performance lens delivers exceptional resolution and razor-sharp images even at wide-open apertures. It is recommended for its focal length for outdoor photography, architecture and providing great wide shots that will give a distinct look to your production. In addition to capturing wide-angle shots with the entire scene in focus, you can take snapshots with the subject in focus and the background blurred with an attractive bokeh effect.
This lens is designed to reduce flare and ghosting thanks to the Super Multi Coating system it shares with the other ART series lenses. It also minimizes chromatic aberrations by using two FLD glass elements and five SLD glass elements to minimize transverse chromatic aberration. Its refractive and dispersion indices are extremely low compared to conventional glass, minimizing distortion throughout the image.
The HSM (Hyper Sonic Motor) offers smooth, high-speed AF and extremely quiet performance, contributing to the discreetness of the equipment, while its high torque ensures fast autofocus response. The MF manual focus mode allows you to make fine focus adjustments by simply turning the corresponding ring.
The brass metal mount combines high precision with robust construction. Its treated surfaces and enhanced strength contribute to exceptional lens durability.
With the optional SIGMA USB DOCK, you can update the lens firmware and adjust the focus position and other settings. By connecting the lens to a computer via the SIGMA USB DOCK, SIGMA Optimization Pro software offers various types of settings and levels of customization.
Data sheet
Specific References
| Focal Length | 20mm |
| Maximum Aperture | f/1.4 |
| Minimum Aperture | f/16 |
| Lens Mount | Leica L |
| Format Compatibility | Full-Frame |
| Angle of View | 94.5° |
| Minimum Focus Distance | 10.9" / 27.69 cm |
| Optical Design | 15 Elements in 11 Groups |
| Diaphragm Blades | 9, Rounded |
| Focus Type | Autofocus |
| Image Stabilization | None |
| Filter Size | None |
| Dimensions (ø x L) | 3.57 x 5.11" / 90.7 x 129.8 mm |
| Weight | 2.1 lb / 950 g |
| Package Weight | 2.95 lb / 1.33 kg |
| Box Dimensions (LxWxH) | 8 x 4.8 x 4.7" |
