Large f/2.8 maximum aperture for bright viewfinder image and pinpoint focusing even in dim light. Ultra- wide 94° picture coverage with edge to edge sharpness. Tremendous depth of field enables no-focus quick shooting and action photography. Close- range- correction (CRC) System assures center- to – edge sharpness even at close range. Distortion- free pictures even at minimum distance of 0.25mm (0.85 ft). Retrofocus design means virtually no corner light fall- off even when wide open. Lens construction-12 elements in 9 groups. Picture angle 94°. Diaphragm- Automatic. Aperture scale- f/2.8~ f/22 on both standard and aperture- direct- readout scales. Distance scale- Graduated in metres and feet from 0.25m (0.85 ft) to infinity (∞). Weight- 260g. Dimensions- 65mm dia. x 42.5mm extension from lens flange; 54mm long (overall). Front lens cap- Snap-on. Lens hood- HK-14 slip-on type. Lens case- CL-30S hard leatherette, No. 61 soft pouch, or CP-8 plastic.