Should the new Sigma 30mm f/1.4 DC DN standard lens be top of the list for Micro Four Thirds and Sony E-mount users? Richard Sibley finds out.

Product Overview

Overall rating:


Sigma 30mm f/1.4 DC DN


Sigma 30mm f/1.4 DC DN review


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Sigma 30mm f/1.4 DC DN – Test results


Solid: 30mm centre Dotted: 30mm corner

Solid: 30mm centre
Dotted: 30mm corner

The MTF graphs from our Applied Imaging tests show that the 30mm f/1.4 behaves very well indeed, despite its relatively low price. It’s very sharp in the centre, with peak resolution around f/4-f/5.6. The corners aren’t quite so sharp, but this is partially due to slight curvature of field throwing them a little out of focus with our flat test chart. Overall, though, this is an excellent performance.


30mm f/1.4

30mm f/1.4

Shooting at f/1.4 gives noticeable shading on Sony APS-C cameras, with the corners being about 1.2 stops darker than the centre of the frame. But stopping down to f/2.8 essentially eliminates this vignetting entirely. Micro Four Thirds users will also see less vignetting, due to the smaller size of the image sensor.

Curvilinear distortion

SMIA TV = -2.6% 30mm (uncorrected raw)

SMIA TV = -2.6%
30mm (uncorrected raw)

As is the way with modern lens design, the 30mm f/1.4 shows visible barrel distortion when looking at uncorrected raw files. Sigma advises Sony users to set distortion correction to Auto, which should fix this in the camera’s JPEGs. Micro Four Thirds cameras will always correct this automatically.

  1. 1. Sigma 30mm f/1.4 DC DN - Features
  2. 2. Sigma 30mm f/1.4 DC DN - Build and handling
  3. 3. Sigma 30mm f/1.4 DC DN - Image quality
  4. 4. Sigma 30mm f/1.4 DC DN - Test results
  5. 5. Sigma 30mm f/1.4 DC DN - Verdict
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  • Dave Dee

    I agree with all that’s reported here, except for the matter of CAs. I found that even in a moderately backlit situation where the settings used throw the corners out of focus (think tree branches and leaves framing the main subject, but at a markedly different distance) the CAs were a major problem. I have never owned the PL 24mm 1.4 but from reports about CAs for that lens I think we’re probably talking about something similar. Would I buy the Sigma knowing that? Yes, because in many situations it won’t be a big problem.
    I also found that when the lens hood is stored reversed it is so deep it covers the focus ring to the point where the focus ring is all but impossible to use. It’s a bit of a loose fit, too.
    For the price paid it is remarkably good value and a real gem if you prefer the ‘in-between’ focal lengths.