With its wide angle view from 102.4 degrees it can produce striking images with exaggerated perspective. The maximum aperture of F3.5 is ideal for indoor shooting & it enables photographers to emphasize the subject. Two ELD (Extraordinary Low Dispersion) glass elements & a SLD (Special Low Dispersion) glass element provide excellent correction of color aberration. Four aspherical lenses provide correction for distortion & allow compact & lightweight construction. The super multi-layer coating reduces flare & ghosting. High image quality is assured throughout the entire zoom range. The incorporation of HSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focus as well as full-time manual focusing capability. This lens has a minimum focusing distance of 9.4 inches (24cm) throughout the entire zoom range & a maximum magnification ratio of 1:6.6. The lens design incorporates an inner focusing system which eliminates front lens rotation, making the lens particularly suitable for using the Petal-type hood & polarizing filter. The Petal-type hood blocks extraneous light & reduces internal reflection. ...

With its wide angle view from 102.4 degrees it can produce striking images with exaggerated perspective. The maximum aperture of F3.5 is ideal for indoor shooting & it enables photographers to emphasize the subject. Two ELD (Extraordinary Low Dispersion) glass elements & a SLD (Special Low Dispersion) glass element provide excellent correction of color aberration. Four aspherical lenses provide correction for distortion & allow compact & lightweight construction. The super multi-layer coating reduces flare & ghosting. High image quality is assured throughout the entire zoom range. The incorporation of HSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focus as well as full-time manual focusing capability. This lens has a minimum focusing distance of 9.4 inches (24cm) throughout the entire zoom range & a maximum magnification ratio of 1:6.6. The lens design incorporates an inner focusing system which eliminates front lens rotation, making the lens particularly suitable for using the petal-type hood & polarizing filter. The petal-type hood blocks extraneous light & reduces internal reflection. ...

With its wide angle view from 102.4 degrees it can produce striking images with exaggerated perspective. The maximum aperture of F3.5 is ideal for indoor shooting & it enables photographers to emphasize the subject. Two ELD (Extraordinary Low Dispersion) glass elements & a SLD (Special Low Dispersion) glass element provide excellent correction of color aberration. Four aspherical lenses provide correction for distortion & allow compact & lightweight construction. The super multi-layer coating reduces flare & ghosting. High image quality is assured throughout the entire zoom range. The incorporation of HSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focus as well as full-time manual focusing capability. This lens has a minimum focusing distance of 9.4 inches (24cm) throughout the entire zoom range & a maximum magnification ratio of 1:6.6. The lens design incorporates an inner focusing system which eliminates front lens rotation, making the lens particularly suitable for using the Petal-type hood & polarizing filter. The Petal-type hood blocks extraneous light & reduces internal reflection. ...

Sigmas 17-50mm F2.8 EX DC OS HSM large-aperture standard zoom lens covers a focal length from 17mm wide angle & offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture & landscapes. The OS, Sigmas anti shake feature offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. The OS feature allows Sony & Pentax users the option of viewing a stabilized image in the viewfinder, a feature offered only by Sigma. HSM provides fast & quiet AF. ...

Sigma's 17-50mm F2.8 EX DC OS HSM large-aperture standard zoom lens covers a focal length from 17mm wide angle & offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture & landscapes. The OS, Sigma's anti shake feature offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. Sigma's own FLD glass elements, which have performance equal to fluorite along with two glass mold & one hybrid aspherical lens, provide excellent correction for all types of aberrations. The super multi-layer coating reduces flare & ghosting. This lens boasts superior peripheral brightness & provides sharp, high contrast images even at the maximum apertures. With a minimum focusing distance of 11 inches throughout the entire zoom range & a magnification ratio of 1:5. When you need to stand ready for any photo opportunity you need a fast aperture so you can shoot in low existing light or at maximum range with a flash. This Sigma lens is perfect. With its compact size & light weight, it's a necessary addition to your camera bag. ...

Sigma's 17-50 mm F2.8 EX DC OS large aperture standard zoom lens covers a focal length from 17mm wide angle & offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture & landscapes. The OS, Sigma's anti shake feature offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. Sigma's own FLD glass elements, which have performance equal to fluorite along with two glass mold & one hybrid aspherical lens, provide excellent correction for all types of aberrations. The super multi layer coating reduces flare & ghosting. This lens boasts superior peripheral brightness & provides sharp, high contrast images even at the maximum apertures. With a minimum focusing distance throughout the entire zoom range & a magnification ratio. When you need to stand ready for any photo opportunity you need a fast aperture so you can shoot in low existing light or at maximum range with a flash. This Sigma lens is perfect. With its compact size & light weight, it's a necessary addition to your camera bag. ...

Sigma's 17-50 mm F2.8 EX DC OS large aperture standard zoom lens covers a focal length from 17 mm wide angle & offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography especially portraiture & landscapes. The OS, Sigma's anti shake feature offers the use of shutter speeds Approx. 4 stops slower than would otherwise be possible. Sigma's own FLD glass elements, which have performance equal to fluorite along with two glass mold & one hybrid aspherical lens, provide excellent correction for all types of aberrations. The super multi layer coating reduces flare & ghosting. This lens boasts superior peripheral brightness & provides sharp, high contrast images even at the maximum apertures. With a minimum focusing distance throughout the entire zoom range & a magnification ratio. When you need to stand ready for any photo opportunity you need a fast aperture so you can shoot in low existing light or at maximum range with a flash. This Sigma lens is perfect. With its compact size & light weight, it's a necessary addition to your camera bag. ...

To achieve an F2.8 aperture at all focal lengths, it employs three aspherical lens to provide optimum aberration compensation. Two Special Low Dispersion (SLD) glass elements are provided for color aberration compensation, to assure high image quality. ...

As a member of the EX series of lenses this third generation Sigma lens is designed with the highest level of optical technology & augments its predecessor with the addition of the Hyper-Sonic Motor (HSM) ensuring a quiet, high speed AF as well as full-time manual focusing capability. Housed in compact construction, the Sigma 24-70mm is a large aperture standard zoom lens ideal for all general photography including portraiture & landscapes. Physically, the shortest lens in the category, its overall length is 3.7 inches/94.7mm. With excellent optics, this could be the foremost performing lens in the category with stunning speed, clarity & color. Intricate lens construction

Includes:: Super Multi Layer Coating reducing flare & ghosting; the combination of ELD (Extraordinary Low Dispersion) & two SLD (Special Low Dispersion) glass elements & three aspherical lenses provide excellent correction of all types of aberrations. Superior optical performance is ensured throughout the entire zoom range with the minimum focusing distance being 15in/38cm & maximum magnification ratio being 1:5.3. The rounded 9 blade diaphragm gives a natural look to backgrounds & foregrounds.

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To achieve an F2.8 aperture at all focal lengths, it employs three aspherical lens to provide optimum aberration compensation. Two Special Low Dispersion (SLD) glass elements are provided for color aberration compensation, to assure high image quality. ...