This Sigma 24mm f/1.4 DG DN Art Lens delivers the professional level of quality that Sigma's Art line is renowned for. Well-suited for landscape, architecture, street scenes, astrophotography, and more, this lens features an advanced optical and mechanical design that offers incredible edge-to-edge sharpness and overall performance. Designed for full-frame mirrorless cameras, this optic offers new features that are particularly useful for astrophotographers and nighttime landscape shooters. Additionally, four aspherical elements have been integrated into the lens's construction to eliminate distortion and suppress sagittal coma flare significantly, making this lens an ideal choice for astrophotography and nightscapes. The prime 24mm focal length offers a versatile wide-angle perspective when used on full-frame sensors, making it ideal for landscape, nature, and architectural photography. When used with an APS-C-format sensor, the lens offers a 36mm equivalent focal length. Four aspherical elements have been integrated into the lens's construction to eliminate distortion and significantly suppress sagittal coma flare, making this lens an ideal choice for astrophotography and nightscapes. STM (stepping motor) provides fast and near-silent autofocus by controlling the amount of movement of the motor and optimizing the screw pitch to match the optical characteristics. Aperture ring click switch, aperture lock switch, and hood with lock button for quick and efficient handling. NPC (Nano Porous Coating) provides a water and dust repellent coating that is incorporated into the lens's weather-resistant design.