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CP+ 2011:Sigma has introduced the 12-24mm F4.5-5.6 EX DG HSM II, an updated version of its ultra-wideangle zoom for full frame SLRs. It uses a revised optical formula which now incorporates now fewer than four elements made from its latest 'F' low dispersion glass, plus one SLD element, to minimise chromatic aberration. Four aspheric elements (three glass mold and one hybrid) are also employed to reduce distortion and other aberrations. The lens features an integrated hood and splash-proof design.
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Ultra wide-angle lens designed for full frame digital SLR cameras
The Sigma Corporation is pleased to announce the new Sigma 12-24mm F4.5-5.6 DG HSM II.
One SLD and four FLD glass elements compensate for colour aberration and provide excellent image quality throughout the zoom range. Three glass mold elements and one hybrid aspherical lens give advanced performance in a compact and lightweight construction and 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 autofocus 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 Sigma’s splash proof design for use in harsh conditions.
| Focal length | 12-24mm |
|---|---|
| Diagonal Angle of view (FF) | 122 - 84.1º |
| Maximum aperture | F4.5-5.6 |
| Minimum aperture | F22 |
| Lens Construction | • 17 elements / 13 groups • 4 FLD glass elements • 1 SLD glass element • 3 glass mold aspherical elements • 1 hybrid aspherical element |
| No. of diaphragm blades | 5 |
| Minimum focus | 0.28m |
| Maximum magnification | 0.16x |
| AF motor type | Ring-type Ultrasonic |
| Image stabilization | No |
| Filter diameter | • n/a |
| Weight | TBA |
| Dimensions | 87mm x 120.2mm (3.4in x 4.7in) |
| Lens Mount | TBA |
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May 10, 2013
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May 2, 2013
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May 1, 2013
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Apr 30, 2013
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 | Sigma 12-24mm F4.5-5.6 II DG HSM
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