• HLA (High-response Linear Actuator) quickly and accurately moves the focusing group for fast focus switching and nimble tracking of fast-moving subjects.
• Matching the focal length versatility, this lens also offers a 1:2 maximum magnification ratio at the 70mm position for close-up shooting. At the wide end of the lens, the magnification is 1:3 and it is 1:4 at the telephoto end.
• Helping to achieve sharp and stable images, this zoom features a powerful image stabilization system that compensates for 6 stops of camera shake at the 16mm position and 4.5 stops of shake.
• Powered by Sigma's OS2 algorithm—the same used in Sigma's larger super-telephoto lenses—this stabilization system suits the versatility of the lens itself and helps reduce camera shake and blur for handheld reliability, even when shooting in low-light and at the long end of the zoom range.

Impressive Optical Quality

• Including a series of low dispersion glass elements and four aspherical elements, the lens has impressive aberration correction, high sharpness and clarity, and accurate color rendering throughout the zoom and focus ranges.
• The optical design has also been tested and adjusted to resist flare and minimize ghosting in a variety of lighting conditions.
• Focus breathing is also well-controlled to benefit filmmaking applications and photographers working with multi-shot composite processes.