The Sigma 40mm 1.4 Art does feature a floating elements design and the performance at the minimum focus distance can be described as decent at f/1.4, good at f/2.0, and excellent at f/2.8. This is what I did here, I refocused for every shot to get the best possible result at different locations in the frame (center, inner midframe and outer midframe).įocus distance was roughly 1.2 m and the circle of the dollar bill is more or less the size of a human eye.ġ00% crops from center, A7rII, because of focus shift (see corresponding section) I refocused for every shotĬlose focus performance is an area where the smaller fast lenses like the Voigtlander 40mm 1.2 E or 50mm 1.2 E struggle, as they don’t feature a floating elements design. portrait distanceįor portraiture it isn’t so important how flat the field is, it is more interesting to see what the sharpness is like when focused at different parts of the frame to take field curvature out of the equation. The exposure of the f/1.4 to f/2.0 corner crops has been lifted in post to reveal more details. Stopping down to f/2.0 boosts contrast slightly and f/2.8 looks really amazing. Already at f/1.4 it is usable across the whole frame with almost no field curvature. The Sigma 40mm 1.4 Art has amazing across frame sharpness. This Sigma 40mm 1.4 Art shows an average amount of optical vignetting in the corners for a lens in this class.Īnd there is something else: onion ring structures are noticeably less pronounced compared to the Sigma 35mm 1.4 Art. It is recommended to have a look at this article first to get an idea how this brightness graph works. These figures are slightly better compared to other recent big f/1.4 lenses which usually show around 3.0 EV vignetting at maximum aperture. You can either correct this in Lightroom or directly in camera. Wide open there is noticeable light falloff of roughly 2.2 EV, stopped down to f/2.0 this improves to 1.7 EV, stopped down to f/2.8 it is 1.1 EV and further improves to 0.8 EV at f/8.0. In the limited time I spent with this lens I was not able to evaluate the auto focus performance. Sigma claims the lens is dust- and splash proof and like all of Sigma’s full frame E-mount lenses there is a rubber gasket to be found at the bayonet. I cannot tell you much about the long term reliablity (yet) or about the internal parts. The outside is made from the same high quality polycarbonate we already know from the other Sigma Global Vision lenses. The Sigma 40mm 1.4 Art is a really big and heavy lens, even bigger and heavier than the 35mm 1.2 Art: Sigma 35mm 1.2 Art DG DN – Sigma 35mm 1.4 Art DG – Sigma 40mm 1.4 DGĪ bayonet type lens hood is also part of the package which offers improved build quality like the ones we know from the GM series with a release button and a mix of polycarbonate and rubber (which is really good at attracting dust). The lens further features an AF/MF switch but no other button and no aperture ring. To me this is good news, as coupled with the nice resistance of the focus ring this gives a nice manual focus experience, only the rather short focus throw of 90° spoils the game slightly. Unlike other native AF lenses for E-mount the former DSLR lenses by Sigma feature a physical distance scale and a direct coupling of focus ring and internal mechanics. The Sigma 40mm 1.4 Art is available on | | B&H | | (affiliate links) for $1399/1150€ Operation Handling Sigma 40mm 1.4 Art You may also have a look at the official page. The Sigma 40mm 1.4 Art reviewed here has the following specifications: I only had limited time with the Sigma 40mm 1.4 Art, so this review may not be as thorough as usual. Disclosure: this lens was kindly provided by a reader for the comparison to the 35mm 1.2 Art and 35mm 1.4 Art.
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