Sigma F4 EF mount zoom 24-105mm lens.

Sigma 24-105mm f/4 DG OS HSM Art Lens (Canon EF). The Sigma 24-105mm F/4 DG OS HSM lens is a wide-angle to medium telephoto zoom lens with a constant f/4 aperture. It is designed for full-frame and cropped sensors, and for Canon DSLR cameras. This lens integrates three aspherical elements and two SLD and two FLD glass elements into its construction, minimizing aberrations, field curvature, and distortion across the entire zoom range, providing sharper images without loss of peripheral brightness. Super Multi-Layer Coating is applied to the lens elements, reducing surface reflections, lens flare, and ghosting, creating images with high contrast and color fidelity. The lens barrel is made of Thermally Stable Composite (TSC) material, minimizing thermal shrinkage and providing exceptional rigidity. For autofocus, the Hypersonic Motor (HSM) achieves fast focusing with minimal noise, making it suitable for continuous shooting and video recording. Optimized algorithms provide smooth autofocus with full-time manual focus override. It achieves precise focusing. The brass mount combines high precision with a robust construction, adding durability to the lens. This lens is compatible with Sigma's USB Dock and Sigma Optimization Pro software, allowing you to adjust the focus position and update the firmware to better suit your needs. The rounded 9-blade diaphragm produces beautiful bokeh at both large and small apertures.