Sigma 20mm f1.8 EX DG Asp RF Nikon AF

Price from £201

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Description

Super wide-angle lens with a large aperture of F1.8 and angle of view 94.5°. It has Macro focusing capability with a minimum focusing distance of 20cm/7.9inches (reproduction ratio 1:4). It incorporates an aspherical lens element in the front as well as rear lens groups, to minimize distortion, spherical aberration and astigmatism.

The lens has non-vignetting optical construction, in order to obtain adequate peripheral brightness with open aperture. This is especially desirable for digital cameras. The lens incorporates a rear focus system eliminating front lens rotation, thus allowing the use of a Perfect Hood and easy use of polarizing filters. The lens also incorporates dual-focus mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens.

  • Lens construction: 13 elements in 11 groups
  • Focusing system: Rear Focusing
  • Angle of view: 94.5°
  • Number of diaphragm blades: 9
  • Minimum aperture: F22
  • Minimum focusing distance: 7.9 in. (20cm)
  • Maximum magnification: 1:4
  • Filter size: 82mm
  • External finish: EX finish
  • Lens hood: Perfect hood with Bayonet Mount
  • Dimensions: 88.6mm (dia) x 87mm (length)
  • Weight: 520g

Features

  • Bag/Case size (not supplied): Lens Case 1W
  • Weight (g): 520
  • Dimensions for Lenses: 88.6 x 87mm
  • Type: Fixed Focal Length
  • Type: Wide Angle
  • Lens Fitting: Nikon AF
  • Focusing: Auto
  • Filter - Size: 82mm

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