Sigma 105mm F2.8 EX DG Macro is an Auto Focus (AF) Macro Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF mount lenses.
Lens Mount
Sigma 105mm F2.8 EX DG Macro is compatible with cameras that have Pentax KAF lens mount.
Sensor Coverage
Max sensor coverage of Sigma 105mm F2.8 EX DG Macro is 35mm FF.
Focal Range
Sigma 105mm F2.8 EX DG Macro has a fixed focal lenght of 105mm. When mounted on a 35mm FF format camera, it provides an 50mm equivalent of 105mm.
Aperture
Sigma 105mm F2.8 EX DG Macro has a max aperture of F2.8.