Sigma 17-70 f2.8-4 DC Macro OS HSM
Launched 4th December 2009
17-70mm F2.8-4 DC MACRO OS HSM
Large aperture standard zoom lens designed for digital SLR cameras.
- Minimum focusing distance of 22cm at all focal lengths
- Integrated Optical Stabilisation system
- Aspherical and ELD glass elements
- Large aperture of F2.8 at the wide angle setting
- Hyper Sonic Motor (HSM) ensuring silent, high-speed AF
The Sigma Corporation is pleased to announce the new Sigma 17-70mm F2.8-4 DC MACRO OS HSM.
This large aperture standard zoom lens offers an aperture of F2.8 at the 17mm focal length and is ideal for many situations such as portraits, sports, macro and general photography. The OS (Optical Stabiliser) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. For Sony and Pentax mount, the built-in OS function of this lens can be used even if the camera body is equipped with an anti-shake function. As the compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement. The maximum aperture of F2.8 produces an attractive background blur and improves autofocus speed.
This lens has a minimum focusing distance of 22cm (8.6 inches) throughout the entire zoom range and maximum magnification ratio of 1:2.7, making it ideal for close-up photography. It is possible to focus as close as approximately 4.7cm from the tip of the lens to the subject making this lens particularly useful for close-up photography.
Three aspherical lenses and one ELD (Extraordinary Low Dispersion) glass element provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed AF. This lens has a rounded 7 blade diaphragm which creates an attractive blur to the out of focus areas of the image. The inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the supplied petal-type lens hood and circular polarising filters.
| Specifications | |
| Construction | 17 Elements in 13 Groups |
| Focal Length | 17-70mm |
| Maximum Aperture | ƒ2.8-4 |
| Minimum Aperture | ƒ22 |
| Field of View | 72.4-20.9° |
| Minimum Focus Distance | 22cm |
| Number of blades | 7 |
| Maximum Magnification | 1:2.7 |
| Zooming System | Rotary |
| Filter Size | 72mm |
| Diameter | 79mm (max.) |
| Length | 80mm |
| Weight | 490g |
| SRP at launch: | £399.99 |
| Available Mounts: | Canon, Minolta/Sony, Sigma, Pentax, Nikon |