Sigma AF 28mm f/1.4 DG HSM Art Lens Review - Performance

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Sigma 28mm f/1.4 DG HSM Art Performance

Central sharpness is excellent from the start, wide open, at f/1.4. It is outstanding between f/2 and f/2.8, then excellent from f/4 through to f/11. It is still very good at f/16.

The edges are excellent from f/1.4 to f/2, outstanding at f/2.8, excellent from f/4 through to f/11 and very good at f/16. This is a superb result and basically any aperture can be used for critical work.

Sigma 28mm f/1.4 DG HSM Art MTF Charts

How to read our MTF charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges.

The scale on the left side is an indication of actual image resolution as LW/PH and is described in detail above. The taller the column, the better the lens performance.

For this review, the lens was tested on a Canon EOS 5DS R using Imatest.

 

CA (Chromatic Aberration) is also well under control. The centre of the field shows virtually no CA and edges hardly exceed one third of a pixel, which is unnoticeable on most subject matter.

Sigma 28mm f/1.4 DG HSM Art Chromatic Aberration Charts

How to read our CA charts

Chromatic aberration (CA) is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.

For this review, the lens was tested on a Canon EOS 5DS R using Imatest.

 

Bokeh describes the rendition and gradation of out of focus areas in an image, and this is also very pleasant. The lens has a good “character” in this respect, something difficult to measure but nonetheless something that we can see and appreciate when we get to know a favourite lens.

Flare is generally not a problem, but may be a slight achilles heel when shooting directly into a light source. The lens then becomes vulnerable and there is a loss in contrast and some artefacts become apparent.

Some vignetting is expected with such a fast wide angle lens, and indeed at f/1.4 we find -2.3 stops of corner darkening. This reduces to -1.6 stops at f/2 and thereafter settles down to -1.3 stops throughout the rest of the aperture range. This is a good result for a wide-angle and in any event sometimes a little corner darkening can enhance an image, drawing our attention to the centre of the image, where the main subject usually is.

Overall, a superb performance from a very, very sharp lens.


Sigma 28mm f/1.4 DG HSM Art Sample Photos

 

Sigma 28mm f/1.4 DG HSM Art Aperture range

You can view additional images in the Equipment Database, where you can add your own review, photos and product ratings.


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Comments


STES Plus
2 4 Denmark
27 Jan 2019 2:51PM
Funny how the dust and weather sealed Nikon AF-S NIKKOR 28mm f/1.4E ED was deemed heavy in the CONS bullet points weighing only 645 g or 25 pct less than the Sigma. Finally Sigma got the sealing right, though.

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27 Jan 2019 5:19PM
Fair enough, compared to what film 28mm lenses used to be, these newer lenses are very heavy indeed. However, I guess we're getting used to it as well, and in this case the weight didn't hit me in quite the same way as it did before, so it didn't make the CONS list.
TornadoTys 4 27 United Kingdom
28 Jan 2019 3:18PM
As technology moves forward and new products should get smaller, more efficient and cheaper. It seems DSLR / mirrorless lens are getting bigger and heavier ! lol

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