Sigma 135mm F1.8 DG HSM A is an Auto Focus (AF) Telephoto Prime lens with 35mm FF max sensor coverage and it is designed to be used with Leica L mount lenses.
Sigma 135mm F1.8 DG HSM A is compatible with cameras that have Leica L lens mount.
Max sensor coverage of Sigma 135mm F1.8 DG HSM A is 35mm FF.
Sigma 135mm F1.8 DG HSM A has a fixed focal lenght of 135mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 135mm.
Sigma 135mm F1.8 DG HSM A has a max aperture of F1.8 and a minimum aperture of F16.