Lens construction: 19 lenses in 12 groups (including 3 ED glass lenses), Angle of view: Film and digital SLR in FX format: 12°20'-5°00' digital in DX format Nikon: 8°00'-3°10', Focusing: Internal focusing system Nikon with autofocus controlled by the silent wave motor, and separate focus ring for manual focusing, Minimum focus distance: 2.2 m from the focal plane (over the entire focal length range), Reproduction ratio: 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 1:1, 2:1, 1:1, 2:1