Sigma 20mm F2 DG Full-Frame Contemporary Lens with Manual Aperture Ring (Black, Sony E Mount)

Mirrorless systems now provide fresh value with the Sigma 20mm F2 DG Contemporary Lens in Black for Sony E Mount, a full-frame compatible lens. Excellent optical performance combined with a level of portability that is ideal for lighter and more compact contemporary mirrorless cameras will open up new possibilities for the ideal shot. The Sigma 20mm F2 DG Contemporary matches the newest high-resolution mirrorless cameras with its ultra-high resolving power and outstanding optical performance. With its silent, high-speed stepping motor, the AF drive system can be used for both still and video photography.

Setting a New Contemporary Benchmark

Even at the widest aperture setting of F2, the 20mm F2 DG Contemporary produces the best optical results from the image's center to its edges. Three high-precision glass-molded aspherical lens elements, one SLD element, and one FLD element are used in the lens construction, which is based on the most recent optical design technology and suppresses a variety of optical aberrations. Even the farthest corners of the frame produce crisp, clear images as a result. Accurate replication of extremely brilliant points of light has been accomplished by concentrating on suppressing sagittal coma flare, which is challenging to fix in post-processing. Additionally, this produces incredibly detailed results throughout the image, which is crucial for photographing of the night sky. Even when shooting into bright light sources, the lens's optical design, Super Multi-Layer Coating, and Nano Porous Coating (NPC) guarantee extremely little flare and ghosting. This greatly simplifies the process of taking pictures of backlit subjects while maintaining sharp, high contrast images.

Precise Aspherical Glass Molded Lens

The surfaces of molds used for glass molding must be extremely precise. Sigma achieves this by employing high-precision molds with surface control to an accuracy of plus and minus 5 nanometers (0.000005 mm) or less. These precise aspherical glass-molded lenses offer excellent aberration correction while maintaining a compact lens design.

Nano Porous Coating

The lens is made less vulnerable to intense incident light, like backlight, by combining the super multi-layer coating with Sigma's proprietary coating technology, NPC (Nano Porous Coating). NPC uses porous silica as the coating material, and the nano-sized holes in the porous silica layer allow for a significant reduction in the refractive index, which lowers the reflectance more than traditional anti-reflective coatings. This effectively reduces reflected light that causes flares and ghosting, resulting in clear image quality.

Superior Quality in a Compact Size

Every lens in the I series is made entirely of metal. In addition to giving the barrel a sleek, fashionable appearance, the precision-cut aluminum components offer exceptional longevity, raising the caliber of the finished product. For increased durability, interior structures that slide with the operating ring are also made of metal. These high-precision parts, which are made using Sigma's state-of-the-art metalworking technology, are also utilized in the company's Cine Lens line for professional filmmakers. They offer a beautiful tactile feel and sound effects that entice photographers to reach for and play with them repeatedly. Hairline processing, which is also utilized for the Art line's rear cylinder, is applied to the cover ring, which is situated between the focus and aperture rings. When the lens is attached or detached, this covering serves as a finger grip.

Magnetic Metal Lens Cover

Along with a standard plastic cap, the lens comes with a specially designed magnetic metal lens cover. This unique metal cap securely attaches to the front of the lens via magnets. It can be confidently stated that this carefully designed cap serves as the perfect final detail for the lens.

Inner Focus System

Moveable internal lens components that change focus without affecting lens barrel length are used in this lens' construction to improve stability.

Lens Aberration Correction Compatibility

In order to further improve image quality, this feature adjusts chromatic aberrations, distortion, peripheral lighting, and other issues in-camera while matching the optical properties of the lens.

Sigma's Super Multi-Layer Coating

By blocking internal reflections, Sigma's proprietary Super Multi-Layer Coating reduces flare and ghosting. This original technology is present in every lens in the current Sigma lineup. In digital cameras, reflections between the surfaces of the lens and image sensor can also result in flare and ghosting. Sigma's Super Multi-Layer Coating works incredibly well here, delivering images with exceptional contrast.

Aperture Ring and Focus Mode Switch

The purpose of the aperture ring is to facilitate intuitive operation. The focus mode can be changed from AF to MF by using the Focus Mode switch.

Stepping Motor

In addition to supporting Face and Eye Detection AF and video AF, the lens can achieve smooth, silent, and fast AF thanks to a stepping motor. Rubber sealing is incorporated into the lens mount to shield it from water and dust.