Top features: - Ideal for macro photography with a minimum focusing distance of 22 cm - Range of special elements deliver impressive image quality - OS (Optical Stabiliser) compensates for camera shake - Large maximum aperture of f/2.8 Ideal for macro photography with a minimum focusing distance of 22 cmThe 17-70 mm f/2.8-4 DC HSM has a minimum focusing distance of 22 cm and a maximum magnification ratio of 1:2.8, making it ideal for macro photography. Without the need to change lens, you can take close up pictures of subjects with a clear field of view.Its compact design features durable parts with smaller zoom rings and scale rings. 30% smaller than Sigma's conventional models, the lens incorporates rubber for the attachment part of the provided lens hood.Range of special elements deliver impressive image qualityWith two FLD ("F" Low Dispersion) glass elements, an SLD (Special Low Dispersion) glass element and three aspherical glass lenses, the 17-70 mm f/2.8-4 DC HSM helps you to achieve professional quality images.Chromatic aberration of magnification and axial chromatic aberration are corrected, allowing you to achieve impressive image quality throughout the entire zoom range.OS (Optical Stabiliser) compensates for camera shakeThe lens includes Sigma's unique OS (Optical Stabiliser) function which offers effective correction of approximately four stops, allowing you to compensate for camera shake. This can be achieved in macro range photography, offering you greater control for memorable images.Flare and ghosting are reduced by the Super Multi-Layer coating which provides sharp, high-contrast images even in backlit conditions.Large maximum aperture of f/2.8At the wide end, the lens offers a maximum aperture of f/2.8 while at the telephoto end you can achieve f/4. A bright viewfinder assists with focusing and the composition of images, while fast shutter speeds prevent an object from being blurred and ensuring smooth bokeh in the background.