Sigma 18-50mm F2.8-4.5 DC OS HSM SLR Standard zoom lens Black

Sigma 18-50mm F2.8-4.5 DC OS HSM SLR Standard zoom lens Black

MPN: 861954
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Technical specifications

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Lens system

Closest focusing distance 0.3 m
Number of diaphragm blades 7
Diagonal angle of view (max) 69.3 °
Maximum aperture number 22
Component for SLR

Weight & dimensions

Diameter 74 mm
Filter size 67 mm

Other features

Magnification 1:4.1 x

Additionally

Lens structure 16/12
18-50mm F2.8-4.5 DC OS HSM Large aperture standard zoom lens designed exclusively for digital SLR cameras and incorporates Sigma's original OS (Optical Stabiliser) function.

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) ensures 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 inches) throughout the entire zoom range and a maximum magnification ratio of 1:4.1 making it ideal for close-up photography.

Superior image quality throughout the entire zoom range
Two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction for all type of aberrations. High image quality is assured throughout the entire zoon range.

A bright image through the viewfinder
This lens offers a large aperture of F2.8 at the 18mm focal length. This large aperture provides a bright image through the viewfinder and enables photographers to easily check focusing and composition. The near circular diaphragm creates an attractive blur to the out-of-focus areas which enables photographers to emphasise the subject.

Sigma’s own unique OS (Optical Stabiliser) technology
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. For Sony and Pentax mounts, the built-in OS function of this lens can be used even if the camera body is equipped with an anti-shake function. As compensation for camera shake is visible in the viewfinder, the photographer can easily check for accurate focus and ensure there is no subject movement.
· It is not possible to use the built-in OS function of this lens when using with Pentax ist* series and K100D DSLR cameras.

Quiet and fast AF
An internal focusing system and HSM (Hyper Sonic Motor) ensures quiet and high-speed auto focus.
· AF will not function with Pentax camera bodies that do not support HSM.

High contrast images
The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images throughout the zoom range.

Convenient handling
The lens design incorporates internal focusing and zooming systems, therefore the overall length of the lens does not change during focusing and zooming, ensuring convenient 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.

Minimum focusing distance of 30cm throughout the entire zoon range
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.
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