Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon DSLR Cameras

Sigma 18-35mm f/1.8 DC HSM from DataVision
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Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon DSLR Cameras

Sigma AF 18-35MM F/1.8 DC HSM Lens for Canon

SIGMA 18-35mm F1.8 DC HSM - What makes a standard lens ideal for you? Certain important qualities are required, such as fast maximum 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 the entire focal range, Sigma has relied on the experience and know how gained when designing their super wide angle zoom lenses such as SIGMA12-24mm F4.5-5.6 II DG HSM and SIGMA 8-16mm F4.5-5.6 DC HSM. In addition, the technological innovation at our Aizu factory also contributes to better lens production. It has enabledSigma to develop a wide glass-molded aspheric lens, and the incorporation of SLD (Special Low Dispersion) glass has optimized power distribution of the optical elements and compensated for various aberrations as well as curvature of field at the widest angle. Thanks to their knowledge of lens design accumulated over a long period of time, plus the latest lens manufacturing techniques, SIGMA has finally made the dream of a zoom lens with F1.8 throughout its entire focal range come true. Convenient handling. Convenient handling is achieved by incorporating internal focusing and zooming which prevents any change in the length of the lens when focusing and zooming. It is possible to use a specialist filter, such as a Circular Polarizer, as the front part of the lens does not rotate. Designed to minimize flare and ghosting. Flare and ghosting were thoroughly measured and monitored from an early stage in the lenses development to establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions. Attaching the matched petal type hood, which is supplied,will provide extra protection from flare and ghosting. Minimum focusing distance of 28cm. With a minimum focusing distance of 28cm and a maximum magnification ratio of 1:4.3, this lens is excellent for close-up photography. Hyper Sonic Motor. The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. Optimizing AF algorithm, smoother AF is achieved. It also enables full-time manual focusing capability which

Sigma 18-35mm f/1.8 DC HSM

Test Description

Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon DSLR Cameras

Truly a revolutionary product\, the Sigma 18-35mm 1.8 DC HSM is the first wide-angle to standard zoom lens to achieve a large aperture of 1.8. Designed specifically for APS-C sized sensors\, the Sigma 18-35mm 1.8 translates to 27mm-52.5mm on 35mm camera. Tapping into Sigma’s long history of lens innovations\, the 18-35mm 1.8 DC HSM incorporates a wide glass molded aspherical lens with Special Low Dispersion (SLD) glass to compensate for aberrations and curvature at the widest angle. Internal focusing and zooming allows for more usability and functionality. The 18-35mm is ideal for landscape photography\, portrait photography\, still life photography\, snap shots\, casual photography\, and close-ups and 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 new Global Vision design works features compatibility with the Sigma USB dock for further customization. A 9 blade rounded diaphragm also creates beautiful background blur. The Sigma 18-35mm 1.8 DC HSM is a new benchmark in photographic history and a must have for every camera bag.DC for DigitalSigma's DG lenses are specifically designed to deliver the ultimate level of performance on full frame digital SLRs. Sigma DGs also maximize the abilities of 35mm SLR cameras and APS-C size DSLRs. Thanks to a complete and comprehensive approach to the correction of chromatic aberrations\, you will experience incredible image clarity and smoothness. Specific attention was paid to helping eliminate color fringing often caused by lateral chromatic aberration\, a problem that is magnified at high resolution in digital photography. DG lenses provide exceptionally high contrast along with subtle gradations in tone and color. Super Multi-Layer Coating\, along with Sigma's optimized optical design work to reduce reflections between the image sensor and the lens surfaces. The large image circles of DG lenses mean there will always be enough peripheral illumination to avoid vignetting.Art LensEngineered for those who see photography as a critical expression of self\, our Art line offers sophisticated optical performance and abundant expressive power to deliver faithfully on your artistic vision.Aspherical Lens Elements (ASP)The aspherical lens complex allows freedom of design\, improved performance\, a reduced number of component lenses and a compact size.Hyper Sonic Motor Focusing (HSM)HSM lenses employ a motor powered by ultrasonic waves that produce a quiet\, yet high-speed AutoFocus. You can enjoy high performance with low noise in a variety of shooting situations.InnerFocus(IF)To ensure stability in focusing\, this lens moves the inner lens group(s) without changing the lens' physical length.USB Dock CompatibilityThe Sigma 18-35mm f/1.8 DC HSM Art Lensis compatible with a Sigma USB Dock - Use SIGMA Optimization Pro\, a special software that updates the lens firmware and adjusts parameters\, such as focus and full-time MF.

Manufacturer: Sigma

Sigma 18-35mm f1.8 art dc hsm lens for canon

First wide-angle to standard zoom lens to achieve a large aperture of 1.8 Due to the very shallow depth of field (DOF) of fast glass and focus variation between the cameras, users may experience focus shift and inconsistent AF. This can be fixed by using the AF fine tune ( For Nikon System) or AF Micro Adjustment( For Canon System) in the camera's Menu to calibrate the lens to specific cameras. Also shooting at smaller aperture values will increase the DOF which reduces "focus issues" as the result of the variations and decreases the amount of fall of (Vignetting).
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