Unveiled: Two New Sigma Lenses in the Global Vision Line





Emphasizing the continuing development of high-quality optics as part of their Global Vision lineup, Sigma has announced two new lenses: a redesigned zoom lens, the 18-200mm f/3.5-6.3 DC Macro (OS) HSM lens and a standard prime 50mm f/1.4 DG HSM lens.

18-200mm f/3.5-6.3 DC Macro (OS) HSM Lens

Part of their Contemporary class of high-performance multipurpose zoom lenses, the 18-200mm f/3.5-6.3 is compatible with APS-C format DSLR cameras and is available for Nikon F, Canon EF, Sony A, Pentax K and Sigma SA lens mounts. As an update to an existing 18-200mm lens, Sigma has outfitted this version with enhanced close-up functionality and improved its specs while also making it smaller and lighter than its predecessor. As an APS-C format lens, its 35mm focal length equivalence is 28.8-320mm on Canon cameras and 27-300mm for all the other systems. This is a very versatile set of focal lengths, encompassing most shooting needs from wide-angle to telephoto, and as this range is housed in such a compact form, the lens is comfortable enough to be kept on your camera as an everyday lens. Furthermore, since it is constructed from TSC (Thermally Stable Composite) materials, it performs well in varied environmental conditions and is efficient in its build, leading to the lighter design. A specially treated brass mount provides smooth coupling, precise contacts, and long-term stability. Rubber elements incorporated on the barrel offer protection from the elements and a durable attachment for the included lens hood.

The Sigma OS (Optical Stabilization) system is featured on all but the Sony and Pentax versions of this lens and, therefore, compensation for camera shake in low light and when shooting at longer focal lengths is provided. The OS function is not incorporated into the Sony and Pentax-mount lenses because their camera systems provide in-camera stabilization. The HSM (Hyper Sonic Motor) technology and improved autofocus algorithm deliver fast, accurate, smooth and silent AF action and manual focus is precise and easy to guide with the lens’s wide rubber focus ring.

A distinct improvement of this lens over earlier editions is its macro capability and shortened minimum focal distance of 15.4”. The maximum magnification ratio has been improved to 1:3, for the ability to capture detailed close-ups, and noted on the lens barrel is the maximum magnification at each focal length. The optical design features Special Low Dispersion glass elements with a high-refractive index and double-sided aspherical lenses, which not only give rise to the more compact build, but minimize chromatic aberrations and distortion as well as contribute to superior imaging throughout the focal range. A Super Multi-Layer Coating on the lens elements also improves sharpness and image contrast and minimizes flare and ghosting. A seven-blade rounded diaphragm helps to create a pleasing out-of-focus background to suit selective-focus applications.

50mm f/1.4 DG HSM Lens

As the fundamental standard-length lens for full-frame DSLR cameras, Sigma has taken the reëngineering of their 50mm f/1.4 DG HSM lens to the utmost level and it now sits atop their Art line as a high-performance lens, ready to be embraced by pro shooters and all those who appreciate a good piece of glass. Available for Nikon F, Canon EF, and Sigma SA mounts, the lens’s fast maximum aperture of f/1.4 enables consistently superior performance in low light and distinct shallow depth-of-field control. Its minimum focus distance has been improved to 15.7” and its maximum magnification ratio to 1:5.6. It is therefore a better lens for detailed close-ups than its predecessors and, with a new optical construction of 13 elements in 8 groups including Special Low Dispersion glass elements, peripheral brightness is optimized and overall resolution improved. Sharpness at wide apertures is paramount to Sigma’s redesign of its 50mm f/1.4.

Additionally, improvements have been made to the autofocus algorithm for smoother action and the floating focus system reduces lens movement while focusing. The HSM (Hyper Sonic Motor) produces quiet, high-speed autofocus and manual focus is sensitive and precise. A Super Multi-Layer coating reduces flare and ghosting and, like the above 18-200mm, its brass mount, durable barrel with rubber lens hood attachment, and handsome matte finish make this a lens to be appreciated.

The Nikon, Canon, and Sigma mounts of both lenses are compatible with the Sigma USB Dock for firmware upgrades and settings adjustments and all are suitable for Sigma’s innovative Mount Conversion Service.

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