Sigma 18-35mm F1.8 DC HSM is an Auto Focus (AF) Standard Zoom lens with APS-C / DX max sensor coverage and it is designed to be used with Pentax KAF mount lenses.
Sigma 18-35mm F1.8 DC HSM is compatible with cameras that have Pentax KAF lens mount.
Max sensor coverage of Sigma 18-35mm F1.8 DC HSM is APS-C / DX.
Sigma 18-35mm F1.8 DC HSM has a focal range of 18-35mm and 1.9X zoom ratio. When mounted on a APS-C / DX format camera, it provides an 50mm equivalent of 27 - 52.5mm.