Sigma 12-24mm F4.5-5.6 II DG HSM Lens

Three glass mold elements and one hybrid aspherical lens give advanced performance and compact and lightweight construction. 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 auto focus, 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 splash proof design for use in harsh conditions.

FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definition and high contrast images. 

Key Features
- Image circle large enough for use with 35mm film SLRs and DSLRs with full-frame sensors
-  and provides sharp, high-contrast images, even at maximum apertures
- Hyper Sonic Motor (HSM) ensures quiet, high-speed auto-focus while allowing full-time manual focus override
- Minimum focusing distance is 28cm throughout the entire zoom range
- Maximum magnification ratio of 1:6.4
- Splashproof design for use in harsh conditions