Bundle Accessories: Sigma 24-70mm f/2.8 DG DN II ART Lens for Sony E Mount with Pixel Advanced Accessories & Travel Bundle such as, Pixel Cleaning Kit, Pixel Blower, 3-in-1 USB -C Card Reader & 64GB SD Card. | The optical design has shortened the total optical length, and the lens barrel has been made slimmer by thoroughly downsizing the zoom mechanism. | In addition, the lens barrel has been downsized by placing buttons and switches directly on the lens barrel. | The weight has been reduced by approximately 10% compared to the SIGMA 24-70mm F2.8 DG DN II | Art. By driving the lightweight focus group with the high-thrust HLA, autofocus is significantly swifter than the original version. | 6 FLD glass elements, 2 SLD glass elements, and 5 double-sided aspheric lenses are used. | Aberrations are highly corrected through advanced optical design made possible by advanced basic technologies in both design and manufacturing, including the use of new glass materials and aspherical lenses with thin walls and high degrees of asphericity. | Sagittal coma flare is heavily corrected to achieve MTF characteristics surpassing those of the highly acclaimed SIGMA 24-70mm F2.8 DG DN II | Art. The high level of flare resistance also results in point images, such as stars, at the periphery of the image being closer to ideal points. | A close-focusing distance of 6.7 inches at the wide end at 1:2.7 magnification* adds to the versatility of this lens, and the addition of a click/declick and lockable aperture ring, along with an additional AF-L button for vertical orientation still or video capture, are additional enhancements of this second-generation lens. | As a DG DN Art lens designed specifically for full-frame mirrorless camera systems, the SIGMA 24-70mm F2.8 DG DN II | Art is built with dust and splash-resistant structure, water and oil-repellent coatingon the front lens element, and durable brass bayonet mount; along with click/de-click and lockable aperture ring, and AFL button and AF/MF switch.