Ultra-wide 110° angle of view on full-frame cameras. The wide-angle lens offers a 35mm equivalent focal length of 22.5mm with an 85° angle of view when used on APS-C cameras bodies or in crop modes. Wide aperture range of f/4 to f/32. Lens construction features 12 elements in 9 groups with 3 high-refractive elements and on extra-low dispersion element. Minimum focus distance of 4.7" with a minimum working distance of just 0.2". Manual focus and aperture control. When used with APS-C cameras, the Laowa 15mm Macro can utilize +/-6 mm of vertical shift to help correct perspective. True 1:1 magnification allows photographers to capture life-sized images of their subjects while still providing infinity focus for use as a standard wide-angle lens. Near-circular 14-blade aperture diaphragm provides smooth out-of-focus elements. Accepts 77mm threaded filters.