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Sigma 18-35mm f/1.8 Art HSM DC

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Sigma 18-35mm f/1.8 Art HSM DC
Lens type
wide angle
System
Canon
Nikon
Minolta
Pentax
Sony
Mount
Canon EF-S
Nikon F
Pentax K
Sigma SA
Sony A
Focal length
18 - 35 mm / 27 – 52.5mm (35mm equivalent) /
Aperture value
f/1.8
Viewing angles
76.5º - 44.1º
Min. diaphragm
16
Minimum focus distance
0.28 m
Maximum zoom
0.23
Sensor size
APS-C
Autofocus drive
ultrasonic drive motor
Internal focus
Design (elements/groups)
17 elements in 12 groups
Number of diaphragm blades
9
Filter diameter
72 mm
Dimensions (diameter/length)
79x122 mm
Weight
810 g
Added to E-Catalog
june 2015

Perhaps the main feature of this lens can be called the aperture characteristics: it is not only high — f / 1.8 — but also unchanged over the entire range of focal lengths. In this range — 18-35 mm (27-52.5 mm equiv. 35 mm) — this model belongs to the wide-angle. It is designed for APS-C sensors and is available for Canon, Nikon, Pentax and Sony systems. Autofocus drive — ultrasonic. Aperture with 9 blades has a minimum value of 16.

Information in model description is for reference purposes.
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Sigma 18-35mm F18 Art DC HSM Lens for Canon Black 210101

F1.8 maximum aperture F16 minimum Ring-type ultrasonic-type AF motor with full-time manual focusing, 72mm filter size Mini... moremum focusing distance 28 cm/ 11.0 in. USB Dock compatible, MC-11 compatible. Available in Canon EF (EF-S), Sony Alpha (dot), Nikon f (DX) mounts 0.23 optical Zoom
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Sigma 18-35mm F1.8 DC HSM ART Lens with AF for Canon EF-Mount DSLR Cameras

SIGMA 18-35mm F1.8 DC HSM - What makes a standard lens ideal for you? Certain important qualities are required, such as fast... moremaximum aperture, versatility for snap shots, portraiture and indoor photography plus a good combination of a wide range of focal lengths in a compact design. SIGMA 18-35mm F1.8 DC HSM is the first zoom lens ever to achieve a maximum aperture of f1.8 throughout the zoom range. It is a wide aperture, standard zoom-lens for digital single lens reflex cameras with APS-C size sensors. *1 The lens has a focal range equivalent to 27mm - 52.5mm in a 35mm format and it can cover the angles of view of multiple fixed focal length lenses. This wide aperture, standard zoom lens enables the photographer to expand creative possibilities on any occasion. *1 - As of April, 2013 Sigma's Art line delivers high-level artistic quality. Sigma is organizing all its interchangeable lenses into three product lines; Contemporary, Art and Sports. Designed with a focus on sophisticated optical performance and abundant expressive power, the Art line delivers high-level artistic expression. Developed with the maximum emphasis on artistic touch, they are designed to meet the expectations of users who value a creative, dramatic outcome above compactness and multifunction. Along with landscapes, portraits, still-life, close-up and casual snaps, they are perfect for the kind of photography that unleashes the inner artist. Ideal for studio photography, they offer just as much expressive scope when capturing architecture, starry skies, underwater shots and many other scenes. Excellent Usability. A zoom lens is very convenient as it offers various angles of view just by rotating the zoom ring. However, the down side was that no zoom lens ever offered a faster aperture than f2.8 which led photographers to select fixed focal length lenses for brighter images. While the aperture value of prime lenses is superior to zoom lenses, their field of view is always the same, and therefore it was always necessary to carry many fixed focal length lenses. SIGMA 18-35mm F1.8 DC HSM is a next generation lens that can deliver images at f1.8 aperture throughout its focal length. The bright viewfinder is very helpful for checking the focus and composition of the image. If it is compared with a lens of F2.8, the faster shutter speed and the shallow depth of field of F1.8 further expands creativity. From wide to standard range this lens offers the excellent versatility and performance of multiplefixed focal length lenses. Fruit of cutting edge technology. To achieve a wide zoom lens with a maximum aperture of f1.8, various technical problems need to be overcome. As the aperture value gets larger, the depth of focus becomes shallower, thus it makes the lens design extremely complicated in order to compensate for various distortions, such as spherical, axial chromatic and astigmatic aberration along with curvature of field. In order to compensate for astigmatic aberration across
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Sigma 18-35mm F1.8 Art DC HSM Lens for Canon EF (210101) 210954

SIGMA Wide Angle Zoom Auto Focus
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Sigma 18-35mm f/1.8 DC HSM Art Zoom Camera Lens - Nikon 18-35MM-F1.8

Designed specifically for APS-C sized sensors, the 18-35mm f/1.8 DC HSM from Sigma is a innovative wide-angle to standard zoo... morem lens that's achieved a continuous, super-bright f/1.8 aperture. Now you can shoot from landscapes to portraits - product shots to architecture - still lifes to close-up photographs - as the internal focusing and zooming allows for more usability and functionality.Sigma’s already-legendary Art lenses are notable for their cutting-edge optical designs and rugged performance, making them ideal for the most creative and artistic applications. Relatively small in size for a fast f/1.8 lens, it measures 3.1” x 4.8” and weighs 28.6 oz. This Art lens has a constant aperture ranging from f/1.8 to f/16 and utilizes 9 diaphragm blades, the front accepts 72mm filters, along with a petal-shaped hood and caps that are included.Additional highlights include compatibility with Sigma’s USB Dock, allowing users to update the lens firmware and adjust various parameter, such as focus; while the Hyper Sonic Motor (HSM) ensures smooth, fast and accurate autofocusing. The use of Thermally Composite Material (TSC) reduces size and weight but increases accuracy of the lens construction. Its optics are made possible by a wide molded aspherical lens with special Low Dispersion (SLD) glass. SLD glass corrects for chromatic aberration and curvature at the widest angles.ApplicationsTypical Photography:TravelWedding & EventsPortraitFamilyFeaturesGreat for video productionUnique, fast constant aperture zoom lensFront & rear lens caps and lens hood is included with the lensSpecificationsCategory: Lenses, Wide Angle Lenses, USB Dock Compatible, MC-11 CompatibleClass: ArtLens Construction: 17 Elements in 12 GroupsAngle of View: 76.5º-44.2ºNumber of Diaphragm Blades: 9Mininum Aperture: f16Minimum Focusing Distance: 11.0 in / 28 cmFilter Size (mm): 72mmMaximum Magnifications: 1:4.3Dimensions:(Diameter x Length): 3.1 in x 4.8 in / 78mm x 121.0mmWeight: 28.6ozCorresponding Mounts:Sigma: HSM, DCNikon: HSM, DCCanon: HSM, DCPentax: HSM, DCSony: HSM, DCNOTES:HSM -Hyper-Sonic MotorDC - DC for Digital* The appearance, specifications, and the like of the product are subject to change for improvement without notice. Sigma 18-35mm f/1.8 DC HSM Art Zoom Camera Lens - Nikon.
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Sigma 18-35mm f/1.8 DC HSM ART Lens for Canon EF 210-101

The Sigma 18-35mm f/1.8 DC HSM Lens for Canon is a wide-angle to normal-length zoom lens that features a fast, bright constan... moret f/1.8 maximum aperture. It is specifically designed for use with APS-C-sized sensors and provides a 35mm-equivalent focal length range of 28.8-56mm.The lens integrates one aspherical element into its construction as well as Special Low Dispersion (SLD) glass to help minimize various aberrations and distortions throughout the zoom range as well as provide greater image sharpness and clarity. A Super Multi-Layer Coating has also been applied to lens elements to reduce surface reflections, lens flare and ghosting to produce images with higher contrast and color
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Sigma's Art Series lens is unparalleled in native Nikon lenses or third-party products, being the world's first zoom lens with a constant f/1.8 aperture throughout its zoom range. The only such option in terms of aperture ratio is a fresh solution from another Japanese company — Tokina AT-X 14-20mm f / 2 Pro DX.

focal lengths

The focal length range of 18-35mm (27-52mm equivalent) is suitable for shooting almost any scene. The manufacturer himself positions his offspring as a solution for landscapes, portraits and studio photography. Of course, many people would like to see large figures for the maximum focal length, but then they would have to sacrifice the main feature — a constant aperture of f / 1.8. Judging by numerous tests, the lens draws a sharp picture even at the widest apertures.

Design

The lens has 17 elements in 12 groups. All of them move inside a high-quality metal case. This design is good because when focus or changing the focal length, the dimensions of the lens do not change and it does not suck dust into the camera. The front lens has a filter diameter of 72mm and is additionally treated with a multi-layer coating to help combat stray glare and reflections.

Dock station

Another interesting feature of the lens is the ability to fine-tune it through the docking station. It is screwed onto the bayonet mount and connected to the computer. Special software allows you to update the firmware or adjust the focus in order to get rid of unwanted back and front focus phenomena.

Compatibility

The Sigma 18-35mm f/1.8 DC HSM Art is a unique lens. It is compatible with Sigma, Canon, Sony, Pentax and Nikon SLR cameras. Moreover, the presence of the HSM focus drive does not limit the use of the lens with those Nikon cameras that are devoid of a “screwdriver” in their design.

Reference. Back focus is an oversight of the auto focus system, in which the camera focuses behind the subject. Front focus is a similar miss with the only caveat that focus occurs in front of the subject. Both phenomena are inherent exclusively in SLR cameras and often appear on high-aperture optics.

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