Sigma 17mm F4 DG Full-Frame Contemporary Lens with Manual Aperture Ring (Black, L Mount)

Three aspherical lens elements and two SLD glass elements make up the structure of the Sigma 17mm F4 DG Contemporary Lens in Silver for L Mount. Both the front and rear optics feature aspherical lenses. This helps to rectify lens aberrations in addition to maintaining the lens's compact size. Consequently, the lens has a 55mm filter thread (smaller than similar lenses with similar focal lengths), making filter swapping between Sigma I series lenses with the same filter size simple. Additionally, its design reduces the flare and ghosting that ultra-wide-angle lenses frequently exhibit, producing sharp photos in any setting. The cutting-edge processing and production technologies at Sigma's only production site in Aizu have resulted in a lens with genuinely modern performance. The remarkable minimum focusing distance of 12cm is a highlight of utilizing the 17mm. Take incredibly detailed close-up macro photos with wide-ranging backdrops. Additionally, it works well for vlogging and selfies where objects must be at arm's length. The AF is powered by a silent, high-speed stepping motor that produces precise and quick still and video images.

Superior Quality in a Compact Size

Every lens in the I series is made entirely of metal. In addition to giving the barrel a clean, fashionable appearance, the precision-cut aluminum components offer exceptional longevity, raising the standard 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 lineup for professional filmmakers. They give the lens a pleasant, ergonomic feel. Additionally, the I series packs this excellent build quality into a lens body the size of a palm. One of the series' smallest is the Sigma 17mm F4 DG Contemporary. When combined with many I series lenses, you can create a wonderfully small and lightweight shooting kit.

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.

Interior 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.

Linear and Non-linear Focus

A mirrorless lens focus movement technique for mirrorless cameras in connection to the focus ring's rotational angle during manual focusing. The degree of focal point movement with 'non-linear focus' changes according to the speed at which the focus ring rotates. With linear focus, the amount of focal point movement is independent of the focus ring rotational speed as long as the focus ring rotational angle stays constant.

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.

Other Highlights

The lens features a rounded diaphragm and high-speed autofocus compatibility. It has a high-precision, durable brass bayonet mount. Supporting DMF and AF plus MF, it is designed to minimize flare and ghosting. Each lens undergoes Sigma's proprietary MTF measuring system and includes a magnetic metal lens cap. Crafted in Aizu, Japan.