Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Canon EOS

BH #SI2018CAF • MFR #411101
Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Canon EOS
No Longer Available
Protect your Gear
Add a protection plan from $65.99
Trade in your gear for cash: Learn more
Jamie P., B&H Photo Expert

True Know-How

Ask Our Experts


Sigma 20mm f/1.8 Overview

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.

Sigma 20mm f/1.8 Specs

Lens MountCanon EF
Angle of View94.5°
Minimum Focus Distance7.9" / 20.07 cm
Maximum Magnification0.25x
Optical Design13 Elements in 11 Groups
Diaphragm Blades9
Dimensions (ø x L)3.5 x 3.4" / 8.89 x 8.64 cm
Packaging Info
Package Weight1.92 lb
Box Dimensions (LxWxH)5.7 x 5.4 x 5.1"
See any errors on this page? Let us know



What lens hood should be purchased with this?
Asked by: Anonymous
The Sigma Super W/A 20mm f/1.8 EX Aspherical DG DF RF AF Lens will come packaged with a custom lens hood. It is listed in the In the Box description.
Answered by: Chris L.
Date published: 2018-08-27
  • y_2020, m_5, d_1, h_12CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.5
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_1
  • loc_en_US, sid_217794, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_bhphotovideo