Ronkonkoma, NY—Sigma Corporation unveiled the Sigma I series of premium compact prime lenses for full-frame mirrorless cameras. Three new lenses—the 24mm f/3.5 DG DN | Contemporary, 35mm f/2 DG DN | Contemporary and 65mm DG DN | Contemporary—join the previously released 45mm f/2.8 DG DN | Contemporary. Moreover, with all-metal construction for durability and advanced optical designs, the I series lenses are available in L- and Sony E-mount versions.
“When it comes to mirrorless cameras, striking the proper balance between performance and size is even more crucial. We believe there is a growing demand for compact, high-performance, high-quality lenses,” said Mark Amir-Hamzeh, president of Sigma America. “The introduction of the I series of full-frame mirrorless-exclusive lenses answers this call. The I series represents a new option: premium compact primes that are stylish in appearance with impressive specifications and optical performance.”
Furthermore, the I lenses are built to the mechanical and operational standards of Sigma Cine lenses, but in a compact mirrorless form. “The I series have outstanding feel and touch in the hand. The well-damped manual focus ring, aperture ring as well as autofocus switches embody true functional beauty,” the company announced.
Key Sigma I Series Lens Features
All I series lenses have an all-metal body with a stylish finish, as well as precision metal internal parts and a metal lens hood. The 24mm f/3.5 has a petal-type hood. The lenses also feature a manual aperture ring and knurled surfaces for a more enjoyable tactile experience. What’s more, the 35mm f/2 and 65mm f/2 lenses employ a newly-designed arc-type auto/manual focus mode switch.
In addition, their brass bayonet mounts are dust- and splashproof. All three new lenses ship with both a plastic lens cap and a magnetic metallic cap. Further, an optional magnetic cap holder (model CH-11, $29) offers a mini-carabiner for clipping to a camera bag, jacket or belt loop; it also has a donut-style center hole to easily remove the cap when it’s time to place it on the lens. What’s more, I series lenses boast “Made in Japan” craftsmanship.
Moreover, one of the key advantages of mirrorless cameras is their smaller form factor; the new I series optics perfectly match compact systems. In addition, the E-mount version of these lenses supports DMF, AF+MF; the L-mount lenses are compatible with the Sigma UD-11 USB dock (sold separately).
Sigma 24mm f/3.5 DG DN C | Contemporary
This wide-angle prime lens in the company’s Contemporary line offers portability and versatility. In fact, it offers a very compact design similar to that of the 45mm f/2.8 DG DN | Contemporary. However, despite its small size, it is capable of capturing the finest details from high-resolution full-frame cameras.
Additionally, it provides a short minimum focus distance of 4.3 inches and a maximum reproduction ratio of 1:2. Consequently, photographers can shoot without worrying about the distance between the lens and the subject. Notably, the lens’s high resolving power covers the entire image from the center to the edges, to produce edge-to-edge sharpness at all apertures when shooting wide-angle scenes.
In addition to producing attractive bokeh, it gives photographers near-circular out-of-focus highlights, even at the edges of the frame. Subsequently, it aids in creating a close-up image of an in-focus subject with a blurred background.
What’s more, its optical construction of 10 elements in 8 groups includes high-precision, glass-molded aspherical elements; one SLD (super low dispersion) glass; and high refractive index glass elements. They make it possible to combine high optical performance with compactness. Also, a smooth focus drive system complements a quiet, fast stepping motor. As a result, the new 24mm lens is an option for shooting video.
Additionally, the lens is compatible with the same 55mm filter size as its sibling 45mm F2.8 DG DN | Contemporary lens, with a matching diameter and similar overall lengths. Other features include compatibility with lens-based optical correction; Super Multilayer coating to minimize flare and ghosting; an aperture ring and focus mode switch; an inner focus design; and a 7-blade rounded diaphragm. It weighs just 7.9 ounces.
The Sigma 24mm f/3.5 DG DN | Contemporary will have a suggested retail price of $549.
Sigma 35mm f/2 DG DN C | Contemporary
The 35mm I series lens is a high-performance lens that boasts excellent resolving power with a small body weighted for mirrorless systems. The classic wide standard prime provides a maximum aperture of f/2. Moreover, its modest size and weight make it portable enough to carry in a small bag for day-to-day shooting. However, Sigma believes “it is equally comfortable being used for professional photo, such as night sky photography and video works.”
Additionally, using SLD glass, the lens corrects axial chromatic aberration—a point of particular concern with a bright lens. Furthermore, optimal placement of high-refractive index elements provides aberration correction while keeping the amount of glass used to a minimum.
Its 10-element, 9-group construction incorporates one SLD and three high-precision glass-molded aspherical lenses for correction of spherical aberration and field curvature, as well as the fluctuation of aberration at the time of focusing. The design also provides correction of sagittal coma aberration, making it capable of capturing fine details for such applications as night sky photography.
Like its I series counterparts, the cover ring between the focus ring and the aperture ring on this lens has hairline processing that is also used for the rear cylinder of the Art line. This covering functions as a finger hold when attaching or detaching the lens.
Other features include compatibility with high-speed AF and lens-based optical correction; Super Multilayer coating; an aperture ring and focus mode switch; inner focus; support for DMF, AF+MF (E-mount only); and a 9-blade rounded diaphragm. It offers a 10.6-inch minimum focusing distant and 1:5.7 maximum magnification ratio. It weighs in at 11.5 ounces. SRP: $639.
Sigma 65mm f/2 DG DN C | Contemporary
This is a high-spec, daily-use lens that allows a slightly more compressed perspective than standard lenses. As a result, this compact lens for full-frame mirrorless opens up a variety of creative approaches for photography and filmmaking. The ultrasharp 65mm f/2 DG DN | Contemporary can capture extremely fine detail even wide open at its maximum aperture of f/2; and it produces large and round bokeh.
Moreover, axial chromatic aberration—noticeable with medium and telephoto lenses and not effectively reduced in-camera—is corrected with the use of SLD glass. In addition, a pair of glass-molded aspherical lenses is used to correct spherical and chromatic aberration, as well as astigmatism. They also enable a smaller lens. The lens features 12 elements in 9 groups.
Creating natural bokeh, the lens’s reduced vignetting effects help curb lemon-shaped or swirly bokeh. As a result, photographers have greater control over the out-of-focus areas of their images. On top of this, Sigma anti-ghosting and anti-flare technologies ensure performance in backlit conditions.
Other features include Super Multilayer coating; an aperture ring and focus mode switch; inner focus; and a 9-blade rounded diaphragm. It has a 21.7-inch minimum focusing distance and 1:6.8 maximum magnification ratio. It weighs 14.3 ounces. SRP: $699.
All three new I series lenses will ship to authorized U.S. retailers mid-January 2021. Also part of the I series line, the Sigma 45mm f/2.8 DG DN | Contemporary is available now for $549.