The Sigma 12-24mm F4.5-5.6 II DG HSM is an updated version of its ultra-wideangle zoom for full frame SLRs. It uses a revised optical formula which incorporates no 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. Covering an 18-36mm equivalent range on APS-C digital cameras, the 12-24mm features a HSM focus motor for fast and silent AF, with full-time manual focus override. At its closest focussing distance the 12-24mm provides a maximum reproduction ratio of 1:6.4 - not true macro, but usefully close nonetheless. A built-in lenshood protects the front element, and spash-proof construction should keep the lens safe in moderately poor weather.
Sigma's 12-24mm f/4.5-5.6 DG HSM II Lens is designed for use with full-frame digital cameras, and offers a dramatically ultra-wide, minimally distorted zoom lens with a field of view from 122° to 84.1°.
| Brands: | Sigma |
| Lens mount: | Canon EF, Nikon F (FX), Sigma SA Bayonet, Sony/Minolta Alpha |
| Max Format Size (mm): | 35 |
| (F) Maximum Aperture: | 4.5 - 5.6 |
| (F) Minimum Aperture: | 22 |
| Aperture Ring: | No |
| Number of Diaphragm Blades: | 5 |
| Elements: | 17 |
| Groups: | 13 |
| Minimum Focus (m): | 0.28 m (11.02") |
| Maximum Magnification (x): | 0.16 x |
| Autofocus: | Yes |
| Motor Type: | Ring-type ultrasonic |
| Full time Manual: | Yes |
| Focus Method: | Internal |
| Distance Scale: | Yes |
| DoF Scale: | No |
| Diameter (mm): | 120 mm (4.73") |
| Sealing: | No |
| Zoom Method: | Rotary (internal) |
| Power zoom: | No |
| zoom_lock: | No |
| Hood Product Code: | Built-in |
| Tripod Collar: | No |
| Tripod Supplied: | No |
