Focal length 20 mm Maximum aperture f/1.8 Minimum aperture f/16 Lens construction 14 elements in 11 groups (including 3 ED glass and 3 aspherical lens elements, and elements with Nano Crystal Coat) Angle of view FX format: 94° DX format: 70° Minimum focus distance 0.20 m/0.66 ft from focal plane Maximum reproduction ratio 0.19x Diaphragm blades 9 (rounded diaphragm opening) Filter-attachment size 77 mm (P = 0.75 mm) Dimensions Approximately 84.5 mm/3.4 in. maximum diameter x 108.5 mm/4.3 in. (distance from camera lens mount flange) Weight Approximately 505 g/1 lb 1.9 oz Supplied accessories LC-77B Lens Cap (front cap), LF-N1 Lens Cap (rear cap), HB-95 Lens Hood, CL-C1 Lens Case Show More Show Less
