Sigma announces super-fast 18-35mm F1.8 DC HSM Art for APS-C DSLRs

Started Apr 18, 2013 | Discussions thread
ForumParentFirstPreviousNextNext unread
Flat view
Jonathan Brady
Senior MemberPosts: 1,863Gear list
Like?
Sigma announces super-fast 18-35mm F1.8 DC HSM Art for APS-C DSLRs
Apr 18, 2013

I'm surprised this hasn't been posted yet...

http://www.dpreview.com/news/2013/04/18/Sigma-announces-worlds-first-F1-8-constant-aperture-zoom-lens

DPREVIEW intro:

Sigma has announced the 18-35mm F1.8 DC HSM Art lens for APS-C DSLRs - the world's first constant F1.8 zoom. The lens covers a 27-52.5mm equivalent range, though the company has not yet announced which mounts it will be offered in. There is also no announcement of a recommended price. The lens will offer the light-gathering and depth-of-field equivalent of a constant F2.7 on full-frame, which may under-cut the need for some photographers to change formats.

We're impressed to see a manufacturer creating a high-end lens for APS-C at a time when the big DSLR manufacturers are trying to tempt users across to full-frame bodies and the additional lenses that such a move can require. At a time when APS-C cameras (and their sensors) are so good, and continue to make up such a large proportion of DSLR sales, it makes sense to offer high-quality lenses to support them.

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

Should be clickable to enlarge

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

RONKONKOMA, NY, Apr. 18, 2013— Sigma Corporation of America (www.sigmaphoto.com), a leading researcher, developer, manufacturer and service provider for some of the world's most impressive lines of lenses, cameras 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."

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.

Sigma 18-35mm F1.8 DC HSM specifications

Principal specifications Lens type: Zoom lens Max Format size: APS-C / DX mmFocal length: 18–35 Image stabilisation: No Lens mount: Canon EF, Nikon F (FX), Sigma SA Aperture Maximum aperture: F1.8 Minimum aperture: F16.0 Number of diaphragm blades: 9 Aperture notes:  Rounded diaphragm Optics Elements: 17 Groups: 12 Focus ) (11.02mMinimum focus: 0.28 xMaximum magnification: 0.23 Autofocus: Yes Motor type: Ultrasonic Full time manual: Yes Focus method: Internal Distance scale: Yes DoF scale: No Physical )lb (1.79 gWeight: 810 ) (3.07mmDiameter: 78 ) (4.76mmLength: 121 Zoom method: Rotary (extending) mmFilter thread: 72 Hood supplied: Yes

MTF Charts for those who prefer to obsess over details as opposed to taking pictures

Sigma's page for the lens with lots of other charts, etc., to be obsessed over!

http://www.sigma-global.com/en/lenses/cas/product/art/a_18_35_18/

My thoughts...

AWESOME!  Even if you don't buy it, you have to admit that this is a great offering for APS-C camera owners.  It doesn't matter how they achieved it, just THAT they achieved it.  Crop owners having the equivalent of a 28/1.8, 35/1.8, and 50/1.8 all in one lens plus everything in between is PHENOMENAL.

 Jonathan Brady's gear list:Jonathan Brady's gear list
Canon EOS M Canon EOS 70D Canon EF 50mm f/1.4 USM Canon EF 85mm f/1.8 USM Canon EF-S 15-85mm f/3.5-5.6 IS USM +12 more
ForumParentFirstPreviousNextNext unread
Flat view
Post (hide subjects)Posted by
ForumParentFirstPreviousNextNext unread
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow