This lens is an upgrade from a Nikon 20mm f/2.8. It is close to being optically perfect. Although there is no VC, the focus is very fast and quiet. This completes a trio of Sigma Art primes - 20, 35 and 50 mm. Can't praise Sigma enough for these fine primes.

The lens has good contrast and is sharp as a razor. Good in low light. AF is good, the same as the 35mm 1.4 art. Hoping they can come up with a way to put a filter on it. Would like to use my neutral density with this.

Great Picture Quality

Heavy

I have only had this lens for about a month, but I will share my limited experience of using it. The first thing that hits you is the physical size - its a large, heavy lens (950G) and I really had to tighten the tripod up like never before when using it.

Wow. Right, that's why they call it "glass." Beyond a bit of plastic and electronic wizardry that's all this thing is: GLASS. Absolutely incredible imagery. Beautiful wide angles with no discernible distortion. Insane, insane, insane depth of field and bokeh.

While it's a shame that picture and sound quality haven't been upgraded, the iPhone 13 was great in these regards and the iPhone 14 is, too Excellent display Admirable headphone performance Solid build quality No upgrades to picture or sound Familiar design Notch is still present

Apple's latest non-Pro iPhone is superb - it's just that it's strikingly similar to last year's effort.

Still an incredible smartphone, Brilliant battery life gets a bit better, Excellent camera system gets a bit better

Last year’s Pro hardware, Wireless charging slow by modern standards, No USB-C; it’s now well overdue

Conclusions Wide-angle lenses are often on the large side, and it's rare that you see one with an f/1.4 aperture. But the Sigma 20mm F1.4 DG HSM Art is a special lens indeed. Not only does it capture a lot of light, it also manages to focus close, shoot images with excellent detail, and minimize...

Sharp from edge to edge; Minimal distortion; Short minimum focus distance; Available for multiple systems

Heavy; Dim corners and edges; No support for filters

Sigma's latest offering in the Art Lens portfolio is an ultra-wide 20mm full frame lens, for Nikon, Canon and Sigma fit. Not only that, but an extra-bright f/1.4 aperture makes this a desirable optic from the start. All looking good in theory, now let's see how it handled and performed in practice.

Superb optical quality; Well made; High control of CA; Excellent handling; Excellent AF performance

Price penalty for f/1.4 aperture; Heavy and bulky; Not weather resistant

The Sigma 20mm F1.4 DG HSM is a very fast, tack-sharp prime lens in Sigma's excellent Art series, and also a unique lens to boot, as it's the only 20mm lens in the World to offer an f/1.4 aperture.

During the last decade the ultra-wide segment has been dominated by zoom lenses but it seems as if prime lenses are about to enter a renaissance. Lately Nikon released a 20mm f/1.8 and we've seen a bunch of updates from Zeiss and some promising announcements from a new player (irixlens.com).