Lens mount • Pentax KAF mount Construction 6 elements in 5 groups Angle of view 23° (when used with *ist D and K100D body) Aperture control Automatic Diaphragm blades 9 Minimum aperture F22 Metering system TTL open-aperture metering Minimum focus distance 0.7 m (2.3 ft) Filter size 49 mm Maximum magnification 0.12x Dimensions (dia x len) 63 x 26 mm (2.5 x 1.0 in) Weight (no hood) 130 g (4.6 oz)