Sigma AF 20mm f/1.4 DG HSM Art for Sony E full-frame cameras features large-diameter aspherical elements and is suitable for panoramas, landscapes, night sky, architecture, and close-range portraits. The f/1.4 aperture enables bokeh and low-light shooting. The optical design minimizes distortion and lateral chromatic aberration at wide apertures. It includes 2 FLD and 5 SLD elements to reduce chromatic aberration near the frame edges and also minimizes axial aberrations. HSM indicates a quiet ultrasonic autofocus drive. Included: Sigma AF 20mm f/1.4 DG HSM Art Sony E lens, front and rear caps.