On sale 25%
Canon L EF 17-40mm USM 17-40mm
Focal length 17-40mm
Aperture f/4
Mount Canon EF
Weather Sealed Yes
Weight 499 g
af type Autofocus
lens type Wide-Angle Zoom
72 Overall Score
Price CA$833
Snapshot
Pros & Cons
Pros
- Strong social proof (83th percentile) 83th
- Strong versatility (76th percentile) 76th
- Strong aperture (72th percentile) 72th
- Strong macro (71th percentile) 71th
Cons
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews — so you can see whether early praise held up.
Based on 8 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Wide-Angle Zoom |
| Focal Length Min | 17 |
| Focal Length Max | 40 |
| Elements | 12 |
| Groups | 9 |
| Aspherical Elements | 3 |
| ED Elements | 0 |
Aperture
| Max Aperture | f/4 |
| Min Aperture | f/22 |
| Constant | Yes |
| Diaphragm Blades | 7 |
Build
| Mount | Canon EF |
| Format | Full-Frame |
| Weather Sealed | Yes |
| Weight | 0.5 kg / 1.1 lbs |
| Filter Thread | 77 |
AF & Stabilization
| AF Type | Autofocus |
| Stabilization | No |
Focus
| Min Focus Distance | 280 |
| Max Magnification | 1:4.2 |
vs Competition
| Spec | Canon L EF 17-40mm USM 17-40mm | Sigma Contemporary 16-300mm f/3.5-6.7 DC OS | Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD | Nikon NIKKOR Z 28-400mm f/4-8 VR | Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 | Sony E SELP1650 |
|---|---|---|---|---|---|---|
| Focal Length | 17-40mm | 16-300mm | 18-300mm | 28-400mm | 50-200mm | 16-50mm |
| Max Aperture | f/4 | f/3.5 | f/3.5 | f/4 | f/2.8 | f/3.5 |
| Mount | Canon EF | Sony E | Fuji X | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | true | true | false | true | true | false |
| Weight (g) | 499 | 615 | 92 | 726 | 655 | 116 |
| AF Type | Autofocus | HLA | VXD linear motor | STM | linear motor | Stepping motor |
| Lens Type | Wide-Angle Zoom | zoom | zoom | zoom | telephoto | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | Af | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Canon L EF 17-40mm USM 17-40mm | 54.9 | 70.3 | 67.2 | 70.8 | 64.4 | 71.8 | 76.4 | 83.1 | 35.9 |
| Sigma Contemporary 16-300mm f/3.5-6.7 DC OS Compare | 54.9 | 84.6 | 58.3 | 85.9 | 98.9 | 77.5 | 99.6 | 78 | 99 |
| Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD Compare | 98.2 | 75.5 | 96.4 | 87.8 | 74.3 | 77.5 | 99.2 | 83.1 | 81.1 |
| Nikon NIKKOR Z 28-400mm f/4-8 VR Compare | 86.6 | 78.4 | 50.8 | 81.2 | 97 | 71.8 | 98.9 | 83.1 | 98.2 |
| Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 Compare | 98.2 | 86.4 | 54.6 | 22.8 | 95.9 | 84.1 | 88.3 | 65.9 | 96.3 |
| Sony E SELP1650 Compare | 86.6 | 75.5 | 93.6 | 35.1 | 64.4 | 77.5 | 83.5 | 74.1 | 92.5 |
Price
Value & Pricing
From CA$833
B&H Photo 1 offers From CA$833
Jun 6, 2026 CA$833
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
