Sigma A 50 mm f/1.4 DG DN review - Summary

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Sigma A 50 mm f/1.4 DG DN

3 April 2023

Maciej Latałło

11. Summary

Pros:

very solid and weather-sealed mechanical construction,
excellent image quality in the frame centre,
very good image quality on the edge of the APS-C sensor,
sensible image quality on the edge of full frame,
moderate longitudinal chromatic aberration,
negligible lateral chromatic aberration,
lack of any coma problems,
very low astigmatism,
good performance of autofocus,
proper performance against bright light.

Cons:

huge vignetting that decreases slowly on stopping down the aperture,
a tad too high distortion,
distinct focus breathing.

Art line lenses designed for reflex cameras were bulky and heavy instruments. Still, they were also uncompromising when it comes to optcs quality. Art devices designed for mirrorless bodies are a different story – it's clear the approach of Sigma changed a bit. The lenses are still big and heavy but, at the same time, their constructors have given up a bit on correction of such aberrations as distortion and vignetting. After all they are easily corrected by the software of a camera or a computer. Of course such a correction always comes at a price and we've written about it many times.

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Fortunately the rest of optical categories wasn't forgotten and you have to say the Sigma fares there exceedingly well. Of course, in most of cases, it lost the duel with the outstanding Sony lens but you have to remember the Sigma is almost two times cheaper. What's more, it would be difficult to indicate any other lens which could threaten the Sigma's position. Overall, I don't doubt that, because of its price and excellent optical properties, the Sigma will find a lot of satisfied users.