Improved optical performance and more compact size compared to conventional model (similar to SIGMA 85mm F1.4 DG DN Art) Minimized aberrations and exceptional sharpness from F1.4 At wide apertures, light points on the edge of the image are captured as points, making it ideal for astrophotography Very close minimum focusing distance, allowing close-up photography, and beautiful separation between backgrounds and nearby subjects 11 rounded diaphragm blades for exceptionally smooth, appealing bokeh Designed for minimal flare and ghosting thanks to SIGMA's anti-flare technology and team of experienced optical engineers Stepping-type focus motor with single focusing element ensures speed, smoothness and accuracy with mirrorless systems Superb build quality with both aluminum and Thermally Stable Composite components, contributing to its durability, lightness, and operational feel