Canon L EF 17-40mm USM
The constant f/4 aperture and Super UD element deliver consistent exposure and sharpness across the 17-40mm zoom range in a durable L-series build. Its versatile wide-angle coverage is complemented by a bundled accessory kit including filters and a backpack, offering strong value for a professional-grade lens. This lens is best for landscape and architecture photographers who need a rugged, ultra-wide zoom with reliable optical performance.
Focal length 17-40mm
Aperture f/17
lens type zoom
22 Overall Score
Price CA$0
No listings available
Snapshot
Pros & Cons
Pros
- Strong versatility (76th percentile) 76th
Cons
- Below average macro (14th percentile)
- Below average social proof (21st percentile)
- Below average optical (21st percentile)
- Below average bokeh (22nd percentile)
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Zoom |
| Focal Length Min | 17 |
| Focal Length Max | 40 |
Aperture
| Max Aperture | f/17 |
| Constant | Yes |
vs Competition
| Spec | Canon L EF 17-40mm USM | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Sigma Contemporary 12mm f/1.4 DC Contemporary | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS |
|---|---|---|---|---|---|---|
| Focal Length | 17-40mm | 17-70mm | 12mm | 17-28mm | 12-35mm | 18-135mm |
| Max Aperture | f/17 | f/2.8 | f/1.4 | f/2.8 | f/2.8 | f/3.5 |
| Mount | - | Sony E | Canon RF | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | true | false | false | true | true |
| Weather Sealed | false | true | true | true | true | false |
| Weight (g) | - | 544 | 225 | 450 | 306 | 326 |
| AF Type | - | RXD | stepping motor | Stepping Motor | Autofocus | Linear motor |
| Lens Type | zoom | zoom | prime | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Canon L EF 17-40mm USM | 53.5 | 21.9 | 32.9 | 14.2 | 20.9 | 31.2 | 76.4 | 20.6 | 36.8 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.5 | 85.7 | 69.4 | 85.1 | 91.3 | 82.5 | 89.6 | 86.3 | 82.6 |
| Sigma Contemporary 12mm f/1.4 DC Contemporary Compare | 87.1 | 96.5 | 91 | 86.6 | 88.5 | 96.2 | 33.8 | 54.6 | 36.8 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.1 | 85.7 | 76 | 85.1 | 88.5 | 82.5 | 68.3 | 71.6 | 36.8 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.5 | 80.5 | 86 | 50.8 | 86.7 | 82.5 | 80.6 | 86.3 | 97 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98.1 | 73.8 | 73.3 | 40.3 | 78.9 | 75.8 | 95.9 | 90.3 | 82.6 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
