Sigma 17mm F4 and 50mm F2 DG DN | Contemporary I Series...

Sigma 17mm F4 and 50mm F2 DG DN | Contemporary I Series Lenses

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Ronkonkoma, NYSigma Corporation of America introduced two prime I series lenses into its Contemporary line. Exclusively for full-frame mirrorless cameras, the Sigma 17mm F4 and 50mm F2 DG DN | Contemporary lenses are offered in E and L mounts.

Sigma I series lenses have all-metal construction. Precision-cut aluminum parts not only give their barrels a stylish finish but also provide durability. Metal materials are also used in internal structures that slide with the operation ring for added robustness. With Made in Japan craftsmanship and brass bayonet mounts, both lenses are also dust and splash resistant.

Sigma 17mm F4 and 50mm F2 DG DN | Contemporary

Sigma 17mm f/4 DG DN | Contemporary

This new compact prime is the widest focal length I series lens to date. It’s also one of the smallest. For full-frame mirrorless cameras, the super-compact, ultrawide-angle lens weighs 7.9 ounces (L mount) and measures 2.5×1.9 inches.

With a design inspired by Sigma Cine lenses, it adopts I series lens features. They include a metal barrel with a knurled focus ring, an aperture ring and lens hood. Both metal magnetic and snap-on lens caps are provided.

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Sigma 17mm f/4 DG DN | Contemporary

Moreover, its wide-angle of view can capture landscapes with a unique perspective. Thanks to its 4.7-inch minimum close focusing with a 1:3.6 magnification ratio, it’s also an option for close-up photography and handheld selfies.

The lens’s optical design, created exclusively for mirrorless, helps reduce lens flare as well as ghosting with super multi-layer coatings. Its 9-element, 8-group construction includes two SLD glass (special-low dispersion) elements and three aspherical lens elements. The aspherical lenses are used for both the front and rear optics. Consequently, the size of the lens is kept compact while still correcting aberrations.

Further, its minimum focusing distance enables the capture of close-up macro style images with detail and expansive backgrounds. It’s also a solution for selfies and vlogging, where items are shown at an arm’s reach.

The lens also features an inner focusing system and quiet, high-speed stepping motor for fast, accurate autofocus in both still and video capture.

Additional Features

The 17mm lens is compatible with lens aberration correction functions, DMF and AF+MF as well as the AF-assist functions on Sony E-mount cameras.

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Sigma 17mm f/4 DG DN | Contemporary L mount

Other features include an aperture ring; a focus mode switch; support for switching between linear and nonlinear focus ring settings (L mount only); and a 7-blade rounded diaphragm.

Plus, a 55mm filter thread, which is smaller than comparable lenses of similar focal lengths, makes it easier to change filters between Sigma I series lenses sharing that filter size.

The Sigma 17mm f/4 DG DN | Contemporary lens has a suggested retail price of $599.

Sigma 50mm f/2 DG DN | Contemporary

This prime lens adds a classic, standard focal length to the I series. Like other f/2 I series lenses, it features an arc-type AF/MF switch and stylized ring on its barrel. Additionally, the lens’s bright f/2 aperture creates images with a shallow depth of field and beautiful bokeh effects.

The compact lens is also an option for portraits, street and everyday photography. Moreover, Sigma says the lens is for “new photographers looking to take the next step, professionals who require reliable lenses, and photographers who prefer smaller full-frame lenses that offer the best optical quality.”

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Sigma 50mm f/2 DG DN | Contemporary

Its 11-element, 9-group optical design uses one SLD and three aspherical lens elements, as well as an inner focus system. Consequently, it adeptly corrects various types of aberration for high-definition images. Additionally, its optical design delivers performance comparable to the 50mm f/1.4 DG DN | Art lens in a much more compact form (37% shorter length, 48% less in weight).

Further, since its 50mm focal length is known for portraiture, Sigma took careful consideration when designing this lens. The focus was on the smoothness of the bokeh created by the f/2 aperture. Consequently, the lens produces smooth transitions from in-focus to out-of-focus areas. And super multilayer coating minimizes flare and ghosting caused by backlit environments.

The 50mm lens also uses a quiet stepping motor for quick, precise AF for stills and video. In addition, it’s compatible with lens aberration correction, DMF and AF+MF, as well as AF-assist functions on Sony E-mount cameras.

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Sigma 50mm f/2 DG DN | Contemporary L mount

Plus, it features a 58mm filter size and a 17.8-inch minimum focusing distance with 1:6.9 max magnification. Measuring 2.8×2.7 inches, it weighs 12.3 ounces.

The Sigma 50mm f/2 DG DN | Contemporary has an SRP of $639.

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