Sigma 500mm F4.5 EX DG HSM is an Auto Focus (AF)
Telephoto Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF mount cameras.
Lens Mount
Sigma 500mm F4.5 EX DG HSM is compatible with cameras that have Pentax KAF lens mount.Some of the latest released cameras with Pentax KAF lens mount are
Pentax K-3 III,
Pentax K-1 II and
Pentax KP.
Sensor Coverage
Max sensor coverage of Sigma 500mm F4.5 EX DG HSM is 35mm FF.
Focal Range
Sigma 500mm F4.5 EX DG HSM has a fixed focal lenght of 500mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 500mm.
Aperture
Sigma 500mm F4.5 EX DG HSM has a max aperture of F4.5 and a minimum aperture of F32.0.