Canon L 17-40mm f/4L USM 17-40mm
The constant f/4 aperture and L-series optical design with one Super UD and three aspherical elements deliver consistent sharpness across the full-frame zoom range. Its weather-sealed, durable construction is paired with a remarkably light 57g weight, making it a highly portable ultra-wide option. This lens is best for travel and landscape photographers who need a rugged, lightweight zoom and can work without image stabilization.
Focal length 17-40mm
Aperture f/17
Mount Canon EF
Weather Sealed Yes
Weight 57 g
af type USM
lens type zoom
69 Overall Score
Price €0
Snapshot
Pros & Cons
Pros
- Strong build (100th percentile) 100th
- Strong af (94th percentile) 94th
- Strong social proof (88th percentile) 88th
- Strong versatility (76th percentile) 76th
Cons
- Below average bokeh (26th percentile)
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Zoom |
| Focal Length Min | 17 |
| Focal Length Max | 40 |
| Elements | 12 |
| Groups | 9 |
| Aspherical Elements | 3 |
| ED Elements | 1 |
Aperture
| Max Aperture | f/17 |
| Min Aperture | f/4 |
| Constant | Yes |
Build
| Mount | Canon EF |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.1 kg / 0.1 lbs |
| Filter Thread | 77 |
AF & Stabilization
| AF Type | USM |
| Stabilization | No |
Focus
| Min Focus Distance | 279 |
| Max Magnification | 0.24x |
vs Competition
| Spec | Canon L 17-40mm f/4L USM 17-40mm | Nikon NIKKOR Z 17-28mm f/2.8 | Tamron Di III 28-75mm f/2.8 VXD G2 | Sigma Contemporary 10-18mm f/2.8 DC DN | Panasonic Leica DG Vario-Elmarit H-ES12060 | Sony G SELP28135G.SYX |
|---|---|---|---|---|---|---|
| Focal Length | 17-40mm | 17-28mm | 28-75mm | 10-18mm | 12-60mm | 28-135mm |
| Max Aperture | f/17 | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/4 |
| Mount | Canon EF | Nikon Z | Sony E | Sony E | Micro Four Thirds | Sony E |
| Stabilization | false | false | false | false | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 57 | 450 | 540 | 260 | 320 | 420 |
| AF Type | USM | Stepping Motor | VXD | Autofocus | linear motor | SSM |
| Lens Type | zoom | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Canon L 17-40mm f/4L USM 17-40mm | 94.2 | 25.9 | 99.8 | 41.1 | 68.6 | 37.1 | 76 | 87.9 | 37.9 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 86.9 | 88.1 | 73.6 | 86.3 | 86.9 | 85.8 | 68.1 | 64.6 | 37.9 |
| Tamron Di III 28-75mm f/2.8 VXD G2 Compare | 54.6 | 88.1 | 67.2 | 87.3 | 87.8 | 85.8 | 78.2 | 83.1 | 37.9 |
| Sigma Contemporary 10-18mm f/2.8 DC DN Compare | 54.6 | 83.5 | 87.3 | 93.3 | 81.6 | 85.8 | 69.1 | 68.8 | 37.9 |
| Panasonic Leica DG Vario-Elmarit H-ES12060 Compare | 98 | 88.1 | 83.1 | 50.4 | 90.2 | 85.8 | 93.1 | 63.5 | 83.2 |
| Sony G SELP28135G.SYX Compare | 94.2 | 80.2 | 75.5 | 31.2 | 86.9 | 69.9 | 92.3 | 50.2 | 92.8 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
