Sigma 20mm DG DN Lens for Sony Single Wide Mirrorless Cameras F1.4 E-Mount, Focus, Angle, Full-Frame

The lens construction of 17 elements in 15 groups employs two SLD glass elements and three aspherical lenses to correct various aberrations, achieving high point image reproduction even when shooting at an open F value of 1.4, and delivering clear, highly uniform images from the center to the edges. In particular, SIGMA's largest class double-sided aspherical lens thoroughly suppresses sagittal coma flare and field curvature, allowing you to make the most of the ultra-wide 20mm angle of view and render small stars point by point to every corner of the screen. The focus mode switch, AFL button to which any function can be assigned from the camera, MFL switch to prevent unintentional operation, aperture ring lock switch, and the included flower-shaped hood with a locking mechanism to prevent it from falling off and non-slip rubber parts support reliable operation in any shooting scene. A "lens heater retainer" is used to properly attach the lens heater, which prevents condensation from forming inside the lens. Sony E-mount 20mm F1.4 Single focus wide angle Mirrorless Full Frame