LensTip.com

Lens review

Canon EF 20 mm f/2.8 USM

12 April 2010
Szymon Starczewski

11. Summary

Pros:
  • solid casing,
  • excellent resolution in the frame centre,
  • very well corrected astigmatism,
  • decently controlled coma,
  • silent, quick and accurate autofocus.

Cons:

  • average image quality at the frame edge,
  • a bit too high chromatic aberration,
  • huge vignetting even on an APS-C sensor,
  • weak work against bright light.

Our tests are supposed to answer one main question - whether or not a given instrument is worth buying. In the case of the Canon EF 2.8/20 mm the answer is unambiguous – it isn’t! Spending almost 500 $ we get picture effects that are possible to achieve using cheaper and much more universal lenses like a Tamron 17-50 f/2.8 or a Sigma 18-50 f/2.8. If the difference is not visible why should you overpay?

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Sample shots:

Canon EF 20 mm f/2.8 USM - Summary Canon EF 20 mm f/2.8 USM - Summary Canon EF 20 mm f/2.8 USM - Summary
Camera: Canon 20D
Parameters: 20 mm, f/11, exp. 1/500 sek., ISO 400
File: JPG, 3504x2336 pix, 1.9 MB
Camera: Canon 20D
Parameters: 20 mm, f/5.0, exp. 1/400 sek., ISO 200
File: JPG, 3504x2336 pix, 4.0 MB
Camera: Canon 20D
Parameters: 20 mm, f/2.8, exp. 1/200 sek., ISO 200
File: JPG, 3504x2336 pix, 3.2 MB
Canon EF 20 mm f/2.8 USM - Summary Canon EF 20 mm f/2.8 USM - Summary Canon EF 20 mm f/2.8 USM - Summary
Camera:Canon 20D
Parameters: 20 mm, f/8.0, exp. 1/250 sek., ISO 200
File: JPG, 3504x2336 pix, 3.1 MB
Camera: Canon 20D
Parameters: 20 mm, f/2.8, exp. 1/50 sek., ISO 400
File: JPG, 3504x2336 pix, 2.3 MB
Camera: Canon 20D
Parameters: 20 mm, f/2.8, exp. 1/80 sek., ISO 100
File: JPG, 3504x2336 pix, 2.1 MB



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