Pentax 17-70mm F4.0 AL SDM is an Auto Focus (AF) Standard Zoom
lens with APS-C / DX max sensor coverage and it is designed to be used with Pentax KAF3 mount cameras.
Pentax 17-70mm F4.0 AL SDM is compatible with cameras that have Pentax KAF3 lens mount.Some of the latest released cameras with Pentax KAF3 lens mount are
Max sensor coverage of Pentax 17-70mm F4.0 AL SDM is APS-C / DX.
Pentax 17-70mm F4.0 AL SDM has a focal range of 17-70mm and 4.1X zoom ratio. When mounted on a APS-C / DX format camera, it provides an 35mm (FF) equivalent of 25.5 - 105mm.
Pentax 17-70mm F4.0 AL SDM has a constant max aperture of f4 from 17mm all the way to the 70mm .