Sigma 20mm F1.8 EX DG RF is an Auto Focus (AF) Wideangle Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF mount lenses.
Lens Mount
Sigma 20mm F1.8 EX DG RF is compatible with cameras that have Pentax KAF lens mount.
Sensor Coverage
Max sensor coverage of Sigma 20mm F1.8 EX DG RF is 35mm FF.
Focal Range
Sigma 20mm F1.8 EX DG RF has a fixed focal lenght of 20mm. When mounted on a 35mm FF format camera, it provides an 50mm equivalent of 20mm.
Body Colour
Black
Aperture
Sigma 20mm F1.8 EX DG RF has a max aperture of F1.8 and a minimum aperture of F22.0.