Sigma 20mm F1.4 DG HSM Art Lens for Sigma SA

Sigma 20mm f/1.4 Art Lens: Unparalleled Wide-Angle Excellence

Overview:

The Sigma 20mm f/1.4 DG HSM Art Lens stands out as a remarkable choice for photographers seeking superior wide-angle capabilities, especially in challenging lighting conditions. This lens, compatible with Sigma SA-mount cameras, is a gem in Sigma's Art series, known for its top-notch optical quality and robust construction. Its ultra-wide 20mm focal length paired with an impressively fast f/1.4 aperture makes it versatile for landscapes, astrophotography, architectural shots, and low-light scenarios. Key features include its exceptional brightness, enabling stunning low-light performance and shallow depth of field effects. The lens's advanced optical design, incorporating two FLD and five SLD elements, along with two aspherical elements, ensures images are sharp and free from chromatic aberrations. Autofocus is swift and silent thanks to the Hyper Sonic Motor, and the lens's durable build, including Thermally Stable Composite material and a brass bayonet mount, ensures reliability in various shooting environments. Additionally, the 9-blade diaphragm contributes to beautiful bokeh, enhancing creative expression. With its combination of advanced features and solid construction, the Sigma 20mm f/1.4 DG HSM Art Lens is an excellent choice for photographers prioritizing quality and versatility in a wide-angle lens.

More Details:

• Unmatched Brightness: Features a fast f/1.4 maximum aperture, ideal for exceptional low-light performance and creating stunning shallow depth of field effects.

• Exceptional Sharpness: Equipped with a sophisticated optical design that includes two FLD elements, five SLD elements, and two aspherical elements, ensuring razor-sharp images with minimal chromatic aberrations.

• Smooth and Silent Autofocus: Incorporates the Hyper Sonic Motor (HSM) for fast, accurate, and near-silent autofocus, enhancing performance in various lighting conditions.

• Durable Construction: Built with Thermally Stable Composite (TSC) and a brass bayonet mount, this lens is weather-sealed to withstand challenging environments.

• Creative Control: The 9-blade diaphragm contributes to beautiful bokeh, perfect for isolating subjects and adding an artistic touch to your photographs.

• Minimized chromatic aberrations - This lens minimizes chromatic aberrations, a common issue in large-aperture ultra-wide-angle lenses. It features two FLD (“F” Low Dispersion) glass and five SLD (Special Low Dispersion) glass elements to minimize transverse chromatic aberration, which is mainly visible around the edge of the image. The optimized lens power distribution helps minimize axial chromatic aberration. As a result, this lens delivers high image quality in every situation without color smearing, and its rendering performance is consistently sharp with high contrast.
• Minimized distortion - Distortion is a common issue in wide-angle lenses, and it is not possible to correct it simply by changing the aperture value. For this reason, a lens must be designed from the start to minimize this issue. By adjusting the incidence angle of light starting with the first lens element and incorporating optimally positioned aspherical glass elements, this lens minimizes distortion throughout the entire image.
• Exclusive low-dispersion glass - Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as “secondary spectrum” may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (“F” Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite.
• Flare and ghosting reduction - SIGMA’s Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high-contrast images even in backlit conditions.
• Hyper Sonic Motor ensures high AF speed - Ensures silent, high-speed autofocusing, while the optimized AF algorithm helps realize even smoother AF performance. At any time during AF, users may access MF simply by rotating the focus ring. This feature makes faster focus adjustment possible since there is no need to use the AF/MF focus mode switch. *Note: The operation of full-time MF may vary based on mount type.
• Rounded diaphragm - The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.
• High-precision, rugged brass bayonet mount - The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.

• Sigma 20mm F1.4 DG HSM Art Lens for Sigma SA
• Sigma Rear Lens Cap
• LC907-01 Cover Lens Cap
• Limited 1-Year Warranty
• Limited 3-Year U.S.A. Warranty Extension

Frequently Asked Questions about the Sigma 20mm f/1.4 DG HSM Art Lens

What type of photography is the Sigma 20mm f/1.4 best suited for?

The Sigma 20mm f/1.4 is ideal for landscape, astrophotography, architecture, and low-light photography, thanks to its wide-angle view and large aperture.

Can this lens be used on cameras other than Sigma SA-mount?

This specific model is designed for Sigma SA-mount cameras. However, Sigma offers variants compatible with other mounts.

What does the 'Art' designation in Sigma lenses mean?

The 'Art' series in Sigma's lineup represents lenses that prioritize optical performance and are designed for creative and artistic photography.

Is the Sigma 20mm f/1.4 lens weather-sealed?

Yes, it features a durable construction with weather-sealing, making it suitable for use in various environmental conditions.

How does the f/1.4 aperture benefit photographers?

The f/1.4 aperture allows for excellent low-light performance and the ability to create a shallow depth of field for stunning bokeh effects.

Does the lens support autofocus?

Yes, it is equipped with Sigma's Hyper Sonic Motor (HSM) for fast, accurate, and near-silent autofocus performance.

Can I manually adjust focus on this lens?

Yes, the lens offers a manual focus ring with full-time manual override, allowing for precise focus adjustments.

Is the Sigma 20mm f/1.4 compatible with the Sigma USB Dock?

Yes, it is compatible with the Sigma USB Dock, which allows for firmware updates and focus parameter adjustments.