LensTip.com

Lens review

Sigma A 20 mm f/1.4 DG HSM

3 November 2015
Arkadiusz Olech

11. Summary



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Pros:
  • unique parameters,
  • solid and stylish casing,
  • brilliant image quality in the frame centre,
  • excellent resolution on the edge of the APS-C/DX,
  • acceptable image quality on the edge of full frame,
  • slight lateral chromatic aberration,
  • sensible correction of spherical aberration,
  • lack of serious distortion problems,
  • slight vignetting on the APS-C/DX sensor,
  • silent and quick autofocus,
  • excellent parameters/price and performance/price index.

Cons:

  • noticeable coma,
  • very high vignetting on full frame,
  • work against bright light could have been better.

I admit that the tests of fixed focal length Sigma Art series lenses are becoming a bit boring. Every time you get a mechanically solid instrument with outstanding optical properties which, additionally, is sold for a sensible amount of money. When it comes to the model, tested here, Sigma went even one step further, offering original parameters which are hard to find in the line-up of other optical producers. I think there is nothing left to say…