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Sigma 20mm f1.8 EX DG ASPHERICAL RF

Sigma 20mm f1.8 EX DG ASPHERICAL RF
Sigma 20mm f1.8 EX DG ASPHERICAL RF
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Sigma 20mm f1.8 EX DG ASPHERICAL RF
Sigma 20mm f1.8 EX DG ASPHERICAL RF
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Sigma 20mm f1.8 EX DG ASPHERICAL RF

Overview

Description by Sigma:
 
  • 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.

Reviews

Specifications

Specifications
Lens type: 
Fixed Focal Length
Lens Mount: 
Nikon F mount
Canon EF mount
Pentax Kaf Mount
Sony A mount
Sigma SA mount
Optical characteristics
Focal Length: 
20mm
Max Magnification: 
0.25
Lens construction: 
13 Elements in 11 Groups
Diaphragm Blades: 
9 aperture blades
Maximum Aperture: 
f/1.8
Minimum Aperture: 
f/22
Minimum Focusing Distance: 
0.20m
Stabilization system : 
No
Physical characteristics
Diameter: 
86.0mm
Length: 
87.0mm
Weight: 
520g
Filter Diameter: 
82mm

Compatible Cameras

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Canon EOS 100D Front View
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Nikon D5200 Front View
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Nikon D7000 Front View
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Pentax K-7 Front View
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Sigma SD1 Merrill Front View
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Sony SLT-A58 Front View
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