PRESS RELEASE
March 2009
10-20mm F3.5 EX DC HSM
Large aperture, super wide-angle lens for digital SLR cameras.

Ultra wide-angle of view with large maximum aperture of F3.5

Sharp images with high contrast and superior peripheral brightness

Super multi-layer lens coating reduces flare and ghosting

Aspherical lenses perfectly correct coma aberration

Hyper Sonic Motor (HSM) ensuring silent, high-speed AF
The Sigma Corporation is pleased to announce the new SIGMA 10-20mm F3.5 EX DC HSM.
This super wide-angle lens has a maximum aperture of F3.5 throughout the entire zoon range. Its wide
angle of view from 102.4 degrees produces striking images with exaggerated perspective. The maximum
aperture of F3.5 is ideal for indoor shooting and it enables photographers to emphasise the subject.
Two ELD (Extraordinary Low Dispersion) glass elements and one SLD (Special Low Dispersion) glass
element provide excellent correction of colour aberrations. Four aspherical lenses provide correction for
distortion and allow its compact and lightweight construction. The Super Multi-Layer coating reduces
flare and ghosting ensuring high image quality throughout the entire zoom range.
The incorporation of HSM (Hyper Sonic Motor) enables quiet and high-speed auto focus as well as fulltime manual focusing capability. This lens has a minimum focusing distance of 24cm (9.4 inches)
throughout the entire zoom range and 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. The, included, Petal-type hood blocks extraneous
light and reduce internal reflection.
THE SPECIFICATIONS
Minimum Aperture
Lens Construction
Angle of View
No. of Diaphragm Blades
Weight
Dimensions
Available fittings
F22
Minimum Focusing Distance
13 Elements in 10 Groups
Maximum Magnification
102.4-63.8°
Filter Size
7 pcs
Lens Hood
520g
SRP
Diameter 87.3mm x Length 88.2mm
Sigma, Canon, Nikon (D), Pentax, Sony (D)
24cm
1:6.6
82mm
Petal-type hood
£649.99
*Vignetting will occur if the lens is used with 35mm SLR cameras or digital cameras with image sensors larger than APS-C size.
*For Pentax mount, if the camera body does not support HSM, auto focus will not be available.
For further information please contact:
Sigma Imaging (UK) Ltd, 13 Little Mundells, Welwyn Garden City Hertfordshire, AL7 1EW
Tel 01707 329999 E-Mail sales@sigma-imaging-uk.com, Website www.sigma-imaging-uk.com
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