Sigma 20mm F1.4 DG HSM A is an Auto Focus (AF) Wideangle Prime lens with 35mm FF max sensor coverage and it is designed to be used with Canon EF mount lenses.
Sigma 20mm F1.4 DG HSM A is compatible with cameras that have Canon EF lens mount.
Max sensor coverage of Sigma 20mm F1.4 DG HSM A is 35mm FF.
Sigma 20mm F1.4 DG HSM A has a fixed focal lenght of 20mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 20mm.
Sigma 20mm F1.4 DG HSM A has a max aperture of F1.4.