Telephoto zoom lens series pentax hd dfa lens mount pentax k lens speed 28 focal length 70 200 mm zoom factor 29 times suitable for sensor types aps c full frame construction zoom lens area of use sports photography animal photography portrait photography landscape photography night photography focus internal focus auto focus manual focus circular aperture max magnification 17 7 diagonal angle of view 10 7 3 6 diagonal angle of view 35mm 1