Sigma Art 17-40mm f/1.8 DC Art
A constant f/1.8 aperture across a 17-40mm zoom range delivers exceptional low-light capability and shallow depth of field, backed by an optical design with 4 SLD and 4 aspherical elements for sharpness. Its 25.5-60mm equivalent field of view on APS-C provides a versatile walk-around range, and the bundled filter kit adds immediate practical value. This lens is best for portrait photographers on Sony E-mount APS-C who prioritize subject isolation and handheld shooting in dim conditions.
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Snapshot
The 30-Second Version
The Sigma 17-40mm f/1.8 is the fastest standard zoom for APS-C, period. It's a portrait and low-light monster with mediocre macro and no stabilization.
Pros & Cons
Pros
- Constant f/1.8 zoom is basically unheard of at this price 97th
- Weather sealed and built like Sigma Art glass should be 97th
- Gorgeous bokeh for a crop sensor lens 95th
- Useful 25.5-60mm equivalent range 76th
Cons
- No optical stabilization
- Optical sharpness is just okay, not Art-series best
- Macro performance is nearly useless
- Autofocus is average, not a standout
What owners think
The Word on the Street
The proof
Performance
The f/1.8 aperture is the whole story. It sits in the 94th percentile for aperture and 92nd for bokeh, which means you're getting full-frame-ish subject separation on a crop sensor without swapping primes. Autofocus is fine, not spectacular, landing right around the middle of the pack. The HLA motor is quick enough for most stuff, but don't expect Sony GM-level tracking. Optical quality is solid but not class-leading, and there's no stabilization, which stings a bit for handheld video.
Specifications
Full Specifications
Optics
| Type | Zoom |
| Focal Length Min | 17 |
| Focal Length Max | 40 |
| Elements | 17 |
| Groups | 11 |
| Aspherical Elements | 4 |
| ED Elements | 4 |
| Coating | Super Multi-Layer Coating |
Aperture
| Max Aperture | f/1.8 |
| Min Aperture | f/1.8 |
| Constant | Yes |
| Diaphragm Blades | 11 |
Build
| Mount | L-Mount |
| Format | APS-C |
| Weather Sealed | Yes |
| Filter Thread | 67 |
AF & Stabilization
| AF Type | HLA (High-response Linear Actuator) |
| Stabilization | No |
vs Competition
The Nikon Z 17-28mm f/2.8 is the closest philosophical rival, but it's a full-frame lens and a stop slower. The Sony E 18-135mm f/3.5-5.6 OSS gives you way more reach and stabilization, but it's painfully slow by comparison. The Tamron 28-300mm is a superzoom, totally different animal. If you want speed and bokeh on APS-C, the Sigma is in a class of one. If you want versatility and stabilization, go Sony.
| Spec | Sigma Art 17-40mm f/1.8 DC Art | Tamron Di III VC 28-300mm f/4-7.1 VXD | Nikon NIKKOR 20059 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 17-40mm | 28-300mm | 18-55mm | 12-35mm | 18-135mm | 28-70mm |
| Max Aperture | f/1.8 | f/4 | f/3.5 | f/2.8 | f/3.5 | f/2.8 |
| Mount | L-Mount | Sony E | Nikon F | Micro Four Thirds | Sony E | Canon RF |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | true | true | false | true | false | true |
| Weight (g) | - | 590 | 205 | 306 | 326 | 495 |
| AF Type | HLA (High-response Linear Actuator) | VXD linear motor | pulse stepping motor | Autofocus | Linear motor | STM |
| Lens Type | zoom | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma Art 17-40mm f/1.8 DC Art | 53.9 | 97 | 69.5 | 12.1 | 96.6 | 95.4 | 75.8 | 27.4 | 34.4 |
| Tamron Di III VC 28-300mm f/4-7.1 VXD Compare | 97.7 | 83.7 | 62.9 | 83.2 | 96.3 | 71 | 97.9 | 50.6 | 79.3 |
| Nikon NIKKOR 20059 Compare | 84.7 | 81.4 | 83.6 | 95.4 | 54.5 | 82.9 | 82.9 | 86.2 | 92.2 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.9 | 86.7 | 83.8 | 49 | 86.2 | 88.4 | 80.5 | 86.2 | 96.4 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 97.7 | 81.4 | 70.9 | 37.4 | 78 | 82.9 | 95.8 | 90.7 | 79.3 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 84.7 | 86.7 | 70.4 | 41.6 | 83.9 | 88.4 | 77 | 53.6 | 98.4 |
Price
Value & Pricing
At $919 to $988 USD, this is a lot of lens for the money if you shoot portraits or low-light work on APS-C. You're getting f/1.8 across the entire zoom range, weather sealing, and that Sigma Art build quality. It's not cheap, but there's literally nothing else like it for L-Mount crop shooters.
Read more
Overview
Sigma's 17-40mm f/1.8 DC Art is a weird, wonderful lens. A constant f/1.8 zoom for APS-C that covers a genuinely useful 25.5-60mm equivalent range? That's not something you see every day. The headline here is simple: this is the fastest standard zoom you can put on an L-Mount or Sony E crop body, and it's built like a little tank.
Common Questions
Q: Does this lens work on full-frame cameras?
No. It's a DC lens, which means APS-C coverage only. You'll get heavy vignetting on full-frame bodies.
Q: Is the f/1.8 aperture constant through the whole zoom range?
Yes. That's the whole point. You get f/1.8 at 17mm and f/1.8 at 40mm, which is extremely rare for a zoom.
Q: Is this good for video?
It's decent but not ideal. The HLA autofocus is fine, but there's no stabilization, so handheld footage will be shaky unless your body has IBIS.
Who Should Skip This
If you're looking for a do-everything travel zoom or something for macro work, this isn't it. Go grab the Sony E 18-135mm f/3.5-5.6 OSS for reach and stabilization, or a dedicated macro prime if you want to shoot tiny things. This lens is for people who want speed above all else.
Verdict
Buy this if you shoot portraits, events, or low-light work on an APS-C L-Mount or Sony E body and you're tired of swapping primes. The f/1.8 constant aperture is a genuine superpower. Skip it if you need reach, stabilization, or macro. This is a specialist's lens, and it's brilliant at what it does.
