17 pieces in 15 groups adopt 2 SLD glass and 3 aspherical lenses to compensate for aberrations. It achieves high image reproductions from 1.4 open F to 1.4 degrees, and the image is clear and high uniformity without flowing from the center of the screen to the peripheral. In particular, the Sigma's largest large double-sided aspherical lens thoroughly reduces sagittal coma flare and image curvature to create a small star at every corner of the screen while maximizing the angle of view with an ultra-wide angle of 0.8 inch (20 mm)
With a focus mode switch, AFL button to assign any function from the camera, MFL switch to prevent accidental operation, aperture ring lock switch, anti-drop locking mechanism and non-slip rubber parts, the attached flower hood supports you to perform the shooting scene
The lens heater retainer is used to properly attach the lens heater to prevent condensation from forming inside the lens
Sony E-Mount
20mm F1.4
Single Focus Wide Angle
Mirrorless Full Size