This large aperture standard zoom lens covers focal lengths from 24mm and is housed in a compact construction. The latest optical design provides an overall length of 94.7cm /3.7inch. It is ideal for general photography such as snapshots, portraiture, and landscapes. The Super Multi-Layer Coating reduces flare and ghosting. ELD (Extraordinary Low Dispersion) glass, two SLD (Special Low Dispersion) glass elements, and three aspherical lenses provide excellent correction of all types of aberrations. Superior optical performance is ensured throughout the entire zoom range. This lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high-speed AF as well as full-time manual focusing capability. This lens has a minimum focusing distance of 38cm/15in and a maximum magnification ratio of 1:5.3. The rounded 9 blades diaphragm creates an attractive blur. It is possible to attach the included petal-type hood to block out extraneous light.

From the Manufacturer
Compact large aperture standard zoom lens equipped with HSM for the latest digital SLR cameras
This large aperture standard zoom lens covers focal lengths from 24mm and is housed in a compact construction. The latest optical design provides a compact construction and is ideal for general photography. ELD (Extraordinary Low Dispersion) glass, two SLD (Special Low Dispersion) glass elements, and three aspherical lenses provide excellent correction of all types of aberrations. This lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high-speed AF as well as full-time manual focus capability. This lens has a minimum focusing distance of 38cm/15in and a maximum magnification ratio of 1:5.3. The rounded 9 blades diaphragm creates an attractive blur.

Excellent optical performance
ELD (Extraordinary Low Dispersion) glass, two SLD (Special Low Dispersion) glass elements, two molded glass aspherical lenses, and a hybrid aspherical lens provide excellent correction for all type of aberrations. High image quality is assured throughout the entire zoom range.

Large aperture standard zoom lens with compact construction
The lens has a compact construction with an overall length of 94.7mm (3.7"). It is ideal for many situations such as portrait, landscape, and general photography.

F2.8 large aperture over the entire zoom range
This lens offers a large aperture of F2.8 over its entire zoom range. It provides freedom of creative expression and is ideal for photography indoors or in dim lighting.

Hyper Sonic Motor (HSM)
Hyper Sonic Motor
HSM (Hyper Sonic Motor)
HSM indicates lenses equipped with a Hyper Sonic Motor, driven by ultrasonic waves. HSM ensures a quiet and high-speed AF as well as full-time manual focus override by rotation of the focus ring.

Inner focusing system
Rounded Diaphragm
The polygonal shape of a conventional iris diaphragm causes auto-focus light points to appear polygonal. A rounded diaphragm is designed to produce rounded auto-focus light points when opened to near maximum aperture. This creates attractive bokeh effects in many situations, such as when photographing a subject against an out-of-focus surface of the water from which light is being reflected.

Reduce Flare and Ghosting
No Super Multi-Layer Coating (left). With Super Multi-Layer Coating (right).
Reduce Flare and Ghosting
Sigma's own Super Multi-Layer Coating suppresses flare and ghosting by preventing reflections within the lens. All DG and DC lenses in the current Sigma range feature this original technology. In digital cameras, flare and ghosting may also be caused by reflections between the image sensor and lens surfaces. Here too, Sigma's Super Multi-Layer Coating is highly effective, assuring images of outstanding contrast.

Petal-type hood
This lens is equipped with a Petal-type hood to block out extraneous light and reduce internal reflections.
Lens Construction
Lens Construction
In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve autofocus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience.