Sigma 20mm f/1.8 EX DG D ASP RF Super Wide-angle Lens for Nikon
Auto / Manual focus, Aspherical, Rear focus, 20cm Closest focusing distance, 1:4 reproduction ratio, 82mm filter size
NIVO#: 28723Mnf.#: 411442
Warranty: 3 years
Our price: 
R 7,449.00
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Overview & Features top

Sigma 20mm f/1.8 EX DG ASP RF Super Wide-angle Lens

  • Designed for use with full frame digital cameras
  • May also be used with smaller APS-c size sensors
  • Two Aspherical glass elements offer correction for distortion
  • Minimum focusing distance of 7.9 inches allows close-up photography with a lens to subject distance of only 2.6 inches providing a magnification ratio of 1:4
  • Rear focus system eliminates front lens rotation & is suitable for use of Petal-type lens hood & polarizer filters
  • A lens hood, front/rear lens cap and carrying case are included with the lens.
This Sigma 20mm F1.8 EX DG Aspherical RF is a unique Sigma offering with an aperture of F1.8 making it the fastest super wide angle lens available from any camera or lens manufacturer. For the scenic or landscape photographer it’s important to have a wide angle lens with excellent optical performance and Sigma’s aspherical lens technology provides high quality images for the serious shooter. Sigma’s 20mm lens has a field of view of 94.5º and yet provides for a close focusing lens-to-subject distance of only 2.6 inches. Such performance parameters provide great creative freedom to the photographer who wishes to exploit its capabilities for juxtaposing very near subject with the surrounding background. This extreme wide angle view also makes this lens ideal for crating “stitched” panoramic scenes for dramatic effect. The architectural photographer will find this lens attractive for shooting building interiors and the photojournalists will find its fast speed a life saver in low light conditions.

This super-wide-angle lens is ensured minimal light-fall-off with superior peripheral brightness. The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background. This is an ideal DG lens optimized Digital SLR camera.

Features

Minimum focus distance of 20cm

The minimum focusing distance of this lens is 20cm and it has maximum magnification of 1:4 with fast F 1.8 maximum aperture. The minimum focusing distance of 20cm and 94.5 degree angle of view allow close up photography surrounding the photographic subject.

Handling

The lens incorporates Dual-Focus (DF) 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. The rear focus system eliminates the need for the front of the lens to rotate, thus allowing the use of a "Petal-type hood", which is superior light blocking effect.

Incorporated aspherical lenses

The use of aspherical lens elements in both of the front and rear lens groups effectively compensates for distortion, spherical aberration and astigmatism.

*Notice:

Nikon Mount: NO built in motor lens: NOT compatible with D40, D40x, D60, D3000, D5000

What's in the Box top
  • 20mm f/1.8 EX DG ASP RF
  • Lens Hood
  • Fitted Padded Case
  • Front and Rear Caps
  • Instruction Manual
  • Warranty Card
Specification top
General
Lens Type
Ultra Wide Angle
Focal Length
20-20 mm
Zoom / Fixed
Fixed
Lens Mount
Nikon
Min. Focal Length (mm)
20 mm
Max. Focal Length (mm)
20 mm
 
Performance
Focusing
Auto / Manual
Closest Focusing Distance
20 cm
Silent motor
-
Angle of View
94.5
Maximum Aperture
f/1.8
Minimum Aperture
f/22
Max Magnification Ratio
1:4
Image Stabilizer
-
Aspherical Lens
Yes
 
Construction
Lens Construction (elements/groups)
13/11
Diaphragm Blades
9
Rear Focus
Yes
 
Physical Characteristics
Filter Diameter
82 mm
Diameter
89
Length
90
Weight
520
 
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