Sigma 18-35mm f/1.8 Constant Aperture Wide-Angle Zoom

Update (6/14/13): Today Sigma announced that the 18-35mm f/1.8 Art lens will be priced at $799. Starting in early July the lens will be available with Sigma and Canon mounts. Nikon, Pentax and Sony mounts will follow shortly. The lens is compatible with Sigma's new USB dock, providing lens firmware updates and focus parameter adjustments from the computer, which is currently available for $59.

(4/22/13)  Last week Sigma announced a new 18-35mm lens. That's certainly a useful focal range for a lot of photographers, but what's perhaps even more significant is the f/18 aperture which is constant across the zoom range. Designed for APS-C DSLRs, the new lens will be especially interesting for anyone who is experimenting with still and motion capture with their DSLR. You can create the much-hyped "cinematic look" of minimal depth of field with the f/1.8 maximum aperture. The zoom range gives you an approximate equivalent of 27-53mm in 35mm terms.

See the full press release from Sigma below:

Sigma 18-35mm f1.8
Sigma 18-35mm f1.8

Sigma Corporation announces world's first F1.8 constant aperture zoom lens

New 18-35mm F1.8 DC HSM features Global Vision Art lens design


RONKONKOMA, NY - Apr. 18, 2013 — Sigma Corporation of America (, a leading researcher, developer, manufacturer and service provider for some of the world's most impressive lines of lensescameras and flashes, today announced the Sigma 18-35mm F1.8 DC HSM Art lens, the market’s first zoom lens to achieve a maximum aperture F1.8 throughout the entire zoom range.

This revolutionary, wide aperture, standard zoom lens is created for DSLR cameras with APS-C size sensors, which translates to a focal range of 27-52.5mm on a 35mm camera. With a minimum focusing distance of 11 inches, and a maximum magnification ratio of 1:4.3, the 18-35mm is ideal for landscapes, portraits, still-life, studio, close-up and casual photography.

“Exceptionally fast apertures were previously unavailable in zoom lenses, so photographers turned to several prime lenses in a session to get bright images at various focal lengths. We’re incredibly excited to be the first manufacturer to bring the F1.8 standard zoom to the market and to provide photographers with a new level of creativity and convenience, with the outstanding image quality at the core of the new Sigma Global Vision,” said Mark Amir-Hamzeh, president of Sigma Corporation of America.

Amir-Hamzeh added that because developing a large aperture wide angle zoom lens can prove to be technologically and optically challenging, often resulting in various distortions, aberrations and field curvature, Sigma has tapped into its long history as a lens pioneer to overcome those issues in this new generation lens.

“Our experience with the wide angle designs of our 12-24mm F4.5-5.6 II DG HSM and our 8-16mm F4.5-5.6 DC HSM, and our research and development in our Aizu factory have prepared us for this technological advancement,” he said. “Our wide, glass-molded aspherical lens and the incorporation of Special Low Dispersion (SLD) glass have optimized power distribution of the optical elements and compensated for various aberrations, as well as curvature of field at the widest angle. We’re extremely proud of this achievement.”

Sigma 18-35mm f1.8 WIth Lens Hood
Sigma 18-35mm f1.8 WIth Lens Hood

The 18-35mm is the latest addition to the company’s Art line of lenses, designed under the new Global Vision. The Global Vision lenses have a sleek new design with the manufacturing year stamped on the barrel, and are categorized by use into one of three groups: Art, Contemporary and Sports. The Art category delivers high-level artistic expression through sophisticated and abundant expressive power.

The new 18-35mm lens incorporates Sigma’s improved AF/MF switch and the use of Thermally Stable Composite (TSC) compound material, which has a high affinity to metal parts, consistently performs well at extreme temperatures, and reduces the size and weight of the lens. It is also compatible with Sigma’s new USB Dock, which will be available in coming months, enabling photographers to update lens firmware and adjust focus parameters from their computers.

Convenient handling is achieved with internal focusing and zooming, which prevents changes to the size of the lens. Additionally, the front part of the lens does not rotate, so special filters like circular polarizers can be used.

The 18-35mm lens’ Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images, even in backlit conditions. The petal-type hood that is supplied with the lens will provide extra protection from flare and ghosting. Sigma’s Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function and the optimized auto focus algorithm results in smooth focusing and full-time manual focusing capability. Lastly, the nine-blade, rounded diaphragm creates an attractive, round bokeh at large-aperture settings.


Lens Construction: 17 elements in 12 groups

Minimum aperture: F16

Filter size: 72mm

Angle of view (SD1): 76.5°-44.2°

Minimum focusing distance: 11 in.

Dimensions (Diameter x Length): 3.1 inches x 4.8 inches

Number of diaphragm blades: 9 (rounded diaphragm)

Maximum magnification ratio: 1:4.3

Weight: 28.6oz


About Sigma Corporation

For 50 years, Sigma Corporation’s expertise and innovation has driven the company’s core philosophy of “knowledge, plus experience, plus imagination,” with an emphasis on producing high-quality, high-performance photographic technology at moderate prices. This family-owned organization is the largest, independent SLR lens manufacturer in the world, producing more than 50 lenses that are compatible with most manufacturers, including Sigma, Canon, Sony, Nikon, Olympus and Pentax. Sigma Corporation also produces digital SLR cameras and high-definition digital compact cameras. The company is headquartered in Japan, with offices strategically located throughout Europe, Asia and North America. For information, please


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