Sigma 18-50mm f2.8-4.5 DC OS HSM Lens - Canon Fit

This standard zoom lens is designed exclusively for digital SLR cameras and incorporates Sigma's original OS (Optical Stabiliser) function. This lens offers a large aperture of F2.8 at the 18mm focal length making it ideal for indoor photography and in low lighting conditions. Two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. The incorporation of HSM (Hyper Sonic Motor) makes sure of a quiet and high speed AF. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images. This lens has a minimum focusing distance of 30cm (11.8") throughout the entire zoom range and a maximum magnification ratio of 1:4.1 making this lens ideal for close-up photography also. Two SLD (Special Low Dispersion) glass elements and three aspherical lenses give superior correction for all type of aberrations. High image quality is assured throughout the entire zoom range.

This lens offers a large aperture of F2.8 at the 18mm focal length. For easy focusing and composition checking, the viewfinder produces a bright image for the photographers use. The near circular diaphragm creates an attractive blur to the out-of-focus areas which enables photographers to emphasise the subject. This lens is equipped with Sigma's own unique OS function. This system allows the photographer to use shutter speeds approximately 4 stops slower than would otherwise be possible whilst still eliminating camera shake. As compensation for camera shake is visible in the viewfinder, the photographer can easily check for accurate focus and ensure there is no movement in the subject.

It is not possible to use the built-in OS function of this lens when using with Pentax ist* series and K100D DSLR cameras. An internal focusing system and HSM (Hyper Sonic Motor) ensures quiet and high-speed auto focus. throughout the zoom range. The lens design incorporates internal focusing and zooming systems, which means the overall length of the lens does not change during zooming and focusing, ensuring easy handling. The inner focusing also eliminates front lens rotation making the lens particularly suitable for use with circular polarising filters and the supplied petal-type hood. A minimum focusing distance of 30cm (11.8") throughout the entire zoom range and maximum magnification ratio of 1:4.1 makes this lens ideal for close-up photography