Sigma 40mm F1.4 DG HSM A is an Auto Focus (AF) Standard Prime lens with 35mm FF max sensor coverage and it is designed to be used with Sigma SA mount lenses.
Lens Mount
Sigma 40mm F1.4 DG HSM A is compatible with cameras that have Sigma SA lens mount.
Sensor Coverage
Max sensor coverage of Sigma 40mm F1.4 DG HSM A is 35mm FF.
Focal Range
Sigma 40mm F1.4 DG HSM A has a fixed focal lenght of 40mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 40mm.
Aperture
Sigma 40mm F1.4 DG HSM A has a max aperture of F1.4 and a minimum aperture of F16.