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Sigma 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Sigma SLR Camera

Sigma 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Sigma SLR Camera

Sigma 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Sigma SLR Camera

B&H # SI2018SA MFR # 411110
Sigma 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Sigma SLR Camera

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Product Highlights

  • Super Wide Angle
  • Sigma Mount

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Overview
  • 1Description

This 20mm is a Super wide-angle lens with a large aperture of f/1.8 and angle of view 94.5°. It has Macro focusing capability with a minimum focusing distance of just 7.9", for a reproduction ratio of 1:4. The 9-bladed iris diaphragm obtains beautiful out of focus image characteristics. Aspherical lens elements in the front & rear lens groups minimize distortion, spherical aberration and astigmatisms. The lens has non-vignetting optical construction in order to obtain adequate peripheral brightness with wide apertures-especially desirable for digital cameras. The lens incorporates a rear focus system eliminating front lens rotation. The focusing ring does not rotate during autofocus yet provides adequate focusing torque of the focusing ring during manual focusing of the lens. The lens materials used in this new lens are lead and arsenic free ecological glass.

In the Box
Sigma 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Sigma SLR Camera
  • Front & Rear Caps
  • Lens Hood
  • Case
  • Limited 1-Year North and South America Warranty Against Manufacturing and Workmanship Defects.
  • Limited 3-Year U.S.A. Extended Warranty Extension Against Manufacturing and Workmanship Defects.
  • Table of Contents
    • 1Description
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    Specifications
    Performance
    Focal Length 20mm
    Aperture Maximum: f/1.8
    Minimum: f/22
    Camera Mount Type Sigma SA
    Format Compatibility 35mm Film / Full-Frame Digital Sensor
    DSLR (APS-C Sensor)
    Angle of View 94.5°
    Minimum Focus Distance 7.9" (20.07 cm)
    Magnification 0.25x
    Maximum Reproduction Ratio 1:4
    Elements/Groups 13/11
    Diaphragm Blades 9
    Features
    Image Stabilization No
    Autofocus Yes
    Tripod Collar No
    Physical
    Filter Thread 82 mm
    Dimensions (DxL) Approx. 3.5 x 3.4" (8.89 x 8.64 cm)
    Weight 1.14 lb (520 g)
    Packaging Info
    Box Dimensions (LxWxH) 5.5 x 5.5 x 5.5"

    Sigma 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Sigma SLR Camera Review

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