Sigma 17-40mm f/1.8 DC | Art review: prime lens killer | Daily Reports Online

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Sigma 17-40mm f/1.8 DC | Art: One-minute review

Cast your mind back to 2013 and Sigma had just brought out its 18-35mm f/1.8 DC HSM | Art lens – the world’s first zoom with a fast, constant f/1.8 aperture – and was set to revolutionize the photography industry.

Over a decade since that lens pushed the boundaries of what a zoom lens could do, the world’s largest independent lens manufacturer has gone one better with the Sigma 17-40mm f/1.8 DC | Art, which like its predecessor boasts a constant and bright f/1.8 aperture and promises to deliver exceptional image quality comparable to a prime, but with an expanded zoom range, all while being more than 30% lighter than its predecessor.

Sony E, Fujifilm X, and Canon RF versions. I’ve spent a month testing an E-mount version of the lens mounted on a Sony A6700, to see if this optic really can do the job at least three primes.

The TLDR is that it absolutely can, and I thoroughly enjoyed hitting the streets to use it for all sorts of photography, from city shots to portraits, shallow-depth-of-field still-life shots, and even low-light scenes like traffic trails and stars.

(Image credit: Future / Dan Mold)

While the 17-40mm f/1.8 DC | Art builds on its predecessor in pretty much every way, it’s not free from faults. It’s an APS-C lens with a smaller imaging circle, so it’s less future-proof if you upgrade to a full-frame camera later down the road. It’s also very expensive, and costs significantly more than its predecessor did back in 2013.

If money is no limit, and you love to shoot at a range of wide-angle focal lengths while also having the versatility of a fast f/1.8 aperture, this is the lens for you, providing you shoot on an APS-C mirrorless body. However, if you’re on a stricter budget, and prefer smaller lenses and don’t mind switching between them, then you may be better off with one or two cheaper prime lenses instead – provided you’re not shooting weddings and other events where you may have less time to swap your optics over.

Sigma 17-40mm f/1.8 DC | Art: Price and availability

Priced at $919 / £779 / AU$1,650
Lens hood included
Announced in July 2025

The Sigma 17-40mm f/1.8 DC Art costs $919 / £779 / AU$1,650. That’s more than Sigma’s original 18-35mm f/1.8 DC HSM Art, which retailed for $799 / £699 (around AU$1,150) at launch. However, this higher price is to be expected given more than a decade of inflation since then, and tariff increases have likely impacted US pricing too. Regardless, I think the extra money is justified in the US and UK by the suite of upgrades that come with the new and improved version.

It’s difficult to say exactly who this lens is for, as I personally found it a bit frustrating with it either being not wide enough or not telephoto enough for my shooting style, though as someone who regularly likes to shoot with 35mm prime lenses, there were times when the extra versatility from its small zoom range was welcome. It is a bit like a souped-up kit lens, but one that costs significantly more.

If you’re on a tighter budget, and not fussed about that wide f/1.8 aperture, or you’re looking for something a bit more portable for your everyday carry lens, then the Sigma 18-50mm f/2.8 DC DN Contemporary would be a better choice. Similarly, if you don’t want a zoom and simply want a smaller prime lens there are options like the Canon RF 35mm f/1.8 IS Macro STM that are lighter, smaller and a little bit cheaper, too. So it really comes down to what you want to use the lens for.

However, for events and wedding photographers shooting with APS-C bodies I can see this lens being a game changer, giving those photographers extra focal length options and a fast f/1.8 aperture when they may not have the time to change lenses.

Sigma 17-40mm f/1.8 DC | Art: Specs

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Sigma 17-40mm f/1.8 DC | Art specs
Type:	Wide-angle zoom
Mount:	L-mount, Sony E, Fujifilm X, Canon RF
Sensor:	APS-C
Focal length:	17-40mm (25.5-60mm effective on Fujifilm, Sony & L-mount, 27.2-64mm on Canon RF)
Max aperture:	f/1.8
Minimum focus:	0.28m
Filter size:	67mm
Dimensions:	72.9 x 115.9mm
Weight:	18.8oz / 535g

The Sigma 17-40mm f/1.8 DC Art lens improves on its predecessor in virtually every way. Not only is it 34% lighter, tipping the scales at 18.8oz / 535g, it’s also 6.5% leaner in diameter and 4.2% shorter in length. Despite being a skinnier and lighter model it manages to pack in a 2.35x optical zoom, with a more expansive focal range of 17-40mm, whereas the original 18-35mm fell just shy of 2x optical zoom, so the overall zoom range has been expanded by roughly 18%.

Sigma 17-40mm f1.8 DC Art lens product shot taken outdoors on a metal garden table with blurry bokeh background

The rear mount is brass and also weather sealed, confirming the dust and splash-proof credentials of the optic. The lens is available to fit L-mount, Sony E, Fujifilm X and Canon RF, and factoring in the 1.5x crop factor of APS-C sensors the lens will behave much more like a 25.5-60mm, with the exception of Canon cameras, which have a 1.6x sensor crop and with which the lens will be have a slightly tighter perspective at 27.2-64mm.

On the outside of the lens barrel are the zoom and focus rings, which are a decent size and have a knurled rubber finish, making them very grippy and comfortable to use. Because this new lens is designed for modern mirrorless cameras it has an electronic fly-by-wire focus ring rather than a mechanical one, and this also means we’ve lost the focus distance window on the top. Both rings turn smoothly and are easy to operate.

An iris ring is featured on the L-mount, Sony E and Fujifilm X versions, though this is replaced by a Control ring on the Canon RF version. There’s also two customizable focus hold buttons on the lens barrel (Image credit: Dan Mold)

A third ‘iris’ ring sits closest to the lens mount and is for controlling the aperture. This also has a lock to keep it securely in the ‘A’ position if you prefer not to use it, and there’s also a switch to enable or disengage the click – videographers will likely prefer the smoother declicked option when recording footage. It’s also worth noting that on the Canon RF version this is instead a Control ring which can be assigned custom functions for all sorts of settings, including but not limited to aperture.

The zoom is internal, so the lens remains compact and doesn’t rack out when zooming in or out. The throw from 17mm to 40mm on the zoom ring is also quite short, and certainly less than 90 degrees, so you can zoom fully in or out very quickly.

Also on the barrel is a switch to control AF/MF, and there are two AF-L buttons for holding focus, though these can be assigned different functions via the menu.

The lens is dust and splash resistant and a rubber gasket around the rear mount shows the lens has weather sealing (Image credit: Dan Mold)

Heading to the front of the lens we see the front element, which isn’t overly large considering it has a wide f/1.8 max aperture, and this is also where you’ll attach the 67mm screw-in front filters. The front element also has a water- and oil-repellent coating to make it more durable in harsh outdoor environments.

Also in the box is a LH728-02 petal-shaped lens hood, which is part plastic and part rubber for a premium feel, and also has a nice chunky button to lock it in place and release it. This fits on the lens backwards to take up less space when not in use.

When it comes to assessing performance, we first need to consider who the Sigma 17-40mm f/1.8 DC lens is for. It clearly excels in low light with its fast maximum aperture of f/1.8, though its wider focal range of 17-40mm makes it a bit too wide for portraits, so it’s likely to be better suited to indoor events, astrophotography, and perhaps as a wide option for wedding photographers who don’t have time to switch lenses and need its versatility.

I took the lens out around London for several days, using it as my main lens for street photography. In this setup I found it to be a little on the large side, not in terms of width, but in overall length – it’s easily twice the length of, say, my Canon RF 35mm f/1.8 Macro IS STM. This made it more difficult to keep a low profile and take candid shots of people going about their lives without me being noticed, though this is the cost of having a more versatile zoom range.

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