Focal Length: 24 - 70mm Aperture Maximum: f/2.8 Minimum: f/22 Camera Mount Type: Pentax K Format Compatibility: 35mm Film / Full-Frame Digital Sensor APS-C Angle of View: 84° - 34.5° Minimum Focus Distance: 1.25' (38 cm) Magnification: 0.2x Elements/Groups: 17/12 Diaphragm Blades: 9, Rounded Autofocus: Yes Filter Thread Front: 82 mm Dimensions (DxL) Approx. 3.48 x 4.31" (88.5 x 109.5 mm) Weight 787 g Box Dimensions (LxWxH) 7.795 x 6.063 x 4.646"