Offering excellent image quality in an ultra-compact design, this Sigma 17mm f 4 DG DN Contemporary Lensis an ultra-wide-angle prime for Sony E-mount cameras. Designed with an inner focusing system and stepping motor, this lens provides fast and reliable autofocus for both stills and video. The optical design produces high sharpness and clarity throughout the aperture range, and individual elements feature a super multilayered coating to suppress flare and ghosting for greater contrast and color fidelity when working in strong lighting conditions. Additionally, the lens offers a minimum focusing distance of just 4.7 , which allows for unique close-up photographs with expansive backgrounds, making it particularly appealing to vloggers, hikers, landscape photographers, and more.