Sigma 18-35mm f/1.8 Art DC HSM Zoom Lens (for Canon EOS) The first and fastest of its kind. Truly a revolutionary product, the Sigma 18-35mm f/1.8 Art DC HSM Zoom Lens (for Canon EOS) is...
Sigma 18-35mm f/1.8 Art DC HSM Zoom Lens (for Canon EOS) The first and fastest of its kind. Truly a revolutionary product, the Sigma 18-35mm f/1.8 Art DC HSM Zoom Lens (for Canon EOS) 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 f/1.8 translates to 27-52.5mm on 35mm camera. Tapping into Sigmas long history of lens innovations, it 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, snapshots, casual photography, and close-ups. 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 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 f/1.8 DC HSM is a new benchmark in photographic history and a must have for every camera bag. Key Features: 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, Sigmas 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 f/2.8 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. The Sigma 18-35mm f/1.8 DC HSM is a new generation lens that can deliver images at f/1.8 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 f/2.8, the faster shutter speed and the shallow depth of field of f/1.8 further expands creativity. From wide to standard range this lens offers the excellent versatility and performance of multiple fixed focal length lenses. Cutting edge technology: To achieve a wide zoom lens with a maximum aperture of f/1.8, 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 super wide angle zoom lenses such as the Sigma 12-24mm f/4.5-5.6 II DG HSM and Sigma 8-16mm f/4.5-ng super wide angle zoom lenses such as the Sigma 12-24mm f/4.