This Sigma 12-24mm F4.5-5.6 EX DG Aspherical Lens is a result of Sigmas reputation for consistently producing outstanding wide angle and super wide-angle lenses. This lens incorporates an amazing range of popular focal lengths covering angles of view from approximately 85 up to 122. This kind of scope makes this lens critical for landscape and scenic photography and can also be an amazing performer for interior and exterior architectural shooting. Three Aspherical glass elements offer correction for Distortion and four SLD (Special Low Dispersion) glass elements employed for effective compensation of Color aberration. It is also perfect for press or social situations where the photographer often has no control of the distances and size of the subject groups.--Lens Construction 16 Elements... Less

Sigma APO 120-300mm F2.8 EX DG OS HSM (136-101) boasts Optical Stabilization (OS) which is critical to equipment sporting this focal range allowing for hand-held tele-photography and the use of shutter speeds approximately 4 stops slower than would otherwise be possible. Its includes splash-proof feature preventing dust and precipitation from getting inside the lens. One SLD and two FLD glass elements provides maximum correction of chromatic aberrations.The super multi-layer coating reduces flare and ghosting and the lens design incorporates an inner focusing and inner zooming system to ensure sharp images throughout the entire zoom range. Improved optical performance provides excellent correction of sagittal coma flare and ensures ultra-high resolution, comparable to a fixed focal length... Less

The Sigma Corporation is pleased to announce the new Sigma 12-24mm F4.5-5.6 II DG HSM. One SLD and four FLD glass elements compensate for color aberration and provide high image quality.Three glass mold elements and one hybrid aspherical lens give advanced performance and compact and lightweight construction. The Super Multi-Layer Coating reduces flare and ghosting. This lens has superior peripheral brightness and provides sharp and high contrast images even at the maximum apertures. Incorporation of HSM (Hyper Sonic Motor) ensures quiet and high speed auto focus, while allowing full-time manual focus override. This lens has a minimum focusing distance of 28cm (11.0?) throughout the entire zoom range and a maximum magnification ratio of 1:6.4. In addition, this lens features splash proof... Less

Lens Hood, Front & Rear Lens Caps, Pouch Case, 1 Year International Warranty plus 3 Year Sigma U.S.A. Extended Warranty (Total Warranty is 4 Years from Date of Purchase).Sigma Macro 150mm F2.8 EX DG HSM (106-101) boasts Optical Stabilization (OS) which is critical to equipment sporting this focal range and is now splash-proof. Offering the latest optical design technology this lens remains a large aperture medium macro lens ideal for shooting the smaller things in world that exists virtually unseen.A macro lens is one which will focus on a subject close enough to render it "life-size" on the image plane in your camera. It also has a "flat" field" front lens element so that it can shoot images of flat objects such as artwork or postage stamps and be tack sharp all the way across the image... Less