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Sigma 20mm F1.8 EX DG Aspherical RF

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  1. User ratingsUser ratingsratings of product added by Productz users
  2. Expert ratingsExpert ratingsexperts ratings from editorial reviews
  3. Consumer ratingsConsumer ratingsratings from the biggest online stores worldwide
Legend
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4.5
based on all reviews
User ratings:
8
4.0 out of 5
8 user ratings
5 stars
25 %
4 stars
62 %
3 stars
0 %
2 stars
12 %
1 stars
0 %
Editorial reviews:
3
  5. See more
3 editorial reviews
Sigma 20mm f/1.8 EX DG ASP RF 35mm Primes user reviews : 4 out of 5 - 40 reviews - photographyreview.comRead more
We review the Sigma 20mm f1.8 for Canon and see what it's capable of as one of the fastest ultra wide lenses available.Read more
Find out what 9 readers thought of the Sigma 20mm f/1.8 EX DG Aspherical RF in our review.Read more
Read editorial reviews

Pros

  • bokeh is pretty neutral all around
  • image quality it produces is very good
  • rather short focus path the AF works quite fast

Cons

  • aperture bladed crumpled and the aperture arm on the camera stripped
  • rear focus system eliminates the need for the front of the lens to rotate
  • simultaneously as wide and as fast
More pros & cons

Key specs

  • 13
  • Rear
  • yes
  • Full-frame (35mm)
  • , 20 mm
  • no
  • Normal
Go to full specs
Colors

Contents

Sigma 20mm F1.8 EX DG Aspherical RF - Pros & Cons

Sigma 20mm F1.8 EX DG Aspherical RF

Pros

  • bokeh is pretty neutral all around
  • image quality it produces is very good
  • rather short focus path the AF works quite fast
  • nicely sized and solidly built
  • The manual focus ring is nicely sized - and smooth
  • It has a nice quality and also the durability of this lens is superb
  • this lens is really good even in an environment with low lights
  • Lens corrections are incredibly easy thanks to software
  • incredibly easy and quick fix within any
  • The focusing ring is nicely ribbed and easy to use

Cons

  • aperture bladed crumpled and the aperture arm on the camera stripped
  • rear focus system eliminates the need for the front of the lens to rotate
  • simultaneously as wide and as fast
  • some correction dialed in on my bodies
  • abrupt change in lens diameter is not a nice comfort feature
  • do not need a fast aperture
  • 82mm filters are not cheap
  • Sigma lens may be a challenge for your muscle memory
  • The front element does not rotate during focusing
  • a lot of vignetting on the corners
  • reasonably expensive

Sigma - Video Reviews (2)

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Sigma 20mm F1.8 EX DG Aspherical RF - Full Specifications

Units:
Icon
General
Lens typeNormal
Lens mount
  • Canon EF
  • Pentax KAF
  • Sony/Minolta Alpha
  • Sigma SA
  • Nikon F
Icon
Aperture
Aperture max1.8
Aperture min22
Aperture ringyes
Number of diaphragm blades9
Icon
Optics
Elements13
Groups11
Special elements / coatings2 Aspherical elements
Icon
Dimensions
Weight18.34 oz
Diameter3.5 in
Length3.54 in
Filter size3.23 in
Icon
Image properties
Max Format size
Full-frame
Focal length< 20
Image stabilisationno
Icon
Focus
Focus methodRear
Autofocusyes
Full-time Manual focusingyes
Closest focusing distance0.20
Distance scaleyes
Depth of field (DoF) scaleyes
Icon
Design
Colour of productBlack
Tripod collarno
Hood suppliedyes

Sigma 20mm F1.8 EX DG Aspherical RF - Q&A

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Sigma 20mm F1.8 EX DG Aspherical RF Sigma - Editorial Reviews (3)

5.0
Based on 3 reviews
  • 5
  • 4
  • 3
  • 2
  • 1
Sigma 20mm F1.8 EX DG Aspherical RF Sigma 20mm f/1.8 EX DG ASP RF 35mm Primes user reviews : 4 out of 5 - 40 reviews - photographyreview.com
Camera News and Reviews logo
Camera News and Reviews
Published: 12.04.2021
Sigma 20mm f/1.8 EX DG ASP RF 35mm Primes user reviews : 4 out of 5 - 40 reviews - photographyreview.com
5.0

Sigma 20mm f/1.8 EX DG ASP RF 35mm Primes user reviews : 4 out of 5 - 40 reviews - photographyreview.com

By photographyreview
19 minute read
Sigma 20mm F1.8 EX DG Aspherical RF Review: Sigma 20mm f1.8 EX DG RF Aspherical - The Phoblographer
The Phoblographer logo
The Phoblographer
Published: 18.06.2013
Review: Sigma 20mm f1.8 EX DG RF Aspherical - The Phoblographer

We review the Sigma 20mm f1.8 for Canon and see what it's capable of as one of the fastest ultra wide lenses available.

By Abram Goglanian
12 minute read
Sigma 20mm F1.8 EX DG Aspherical RF Sigma 20mm f/1.8 EX DG Aspherical RF Review
Imaging Resource logo
Imaging Resource
Published: 31.10.2005
Sigma 20mm f/1.8 EX DG Aspherical RF Review

Find out what 9 readers thought of the Sigma 20mm f/1.8 EX DG Aspherical RF in our review.

By The Imaging Resource
9 minute read

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