Canon L-series EF 17-40mm f/4L USM 40mm
Sigma Art 17-40mm f/1.8 DC
What Buyers Say
Canon L-series EF 17-40mm f/4L USM 40mm
The Canon EF 17-40mm f/4L USM lens receives overwhelmingly positive feedback from users, particularly for landscape and real estate photography. Reviewers praise its sharpness, wide-angle versatility, and excellent value, especially when purchased at a discount. A few note the lack of image stabilization and the crop factor on APS-C cameras as minor drawbacks, but overall satisfaction is high.
Pros
- Sharp image quality
- Wide-angle versatility
- Great value for money
- Excellent for landscapes
- Good for real estate photography
Cons
- No image stabilization
- Crop factor on APS-C cameras
- Limited to f/4 maximum aperture
- Cannot use multiple filters at 17mm
- Not compatible with teleconverters
Sigma Art 17-40mm f/1.8 DC
The Sigma 17-40mm f/1.8 DC DN Art lens is overwhelmingly praised for its exceptional image quality, fast constant aperture, and compact internal zoom design. Users highlight its sharpness, lightweight build, and excellent autofocus performance, especially on crop-sensor mirrorless cameras like the Canon R7 and Fujifilm bodies. A few questions about compatibility with specific cameras and features like weather sealing and aperture ring are noted, but the overall sentiment is extremely positive.
Pros
- Exceptional image quality
- Fast constant f/1.8 aperture
- Compact internal zoom design
- Lightweight build
- Sharp and bright photos
Cons
- No weather sealing mentioned
- No manual aperture ring on some mounts
- Compatibility questions with full-frame cameras
- Expensive for some buyers
Scores
Specifications
| Canon L-series EF 17-40mm f/4L USM 40mm | Sigma Art 17-40mm f/1.8 DC | |
|---|---|---|
| Optics | ||
| Type | zoom | zoom |
| Focal Length Min | 17 mm | 17 mm |
| Focal Length Max | 40 mm | 40 mm |
| Elements | 12 | 17 |
| Groups | 9 | 11 |
| Aspherical Elements | 3 | 4★ |
| ED Elements | 1 | 4★ |
| Coating | Super Spectra Coating | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | f/22 | f/1.8 |
| Min Aperture | f/4 | f/1.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 7 | 11★ |
| Build | ||
| Mount | Canon EF | Fujifilm X |
| Format | full-frame★ | APS-C |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.50 kg★ | 0.54 kg |
| Filter Thread | 77 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | Ring-Type Ultrasonic Motor | HLA (High-response Linear Actuator) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm | 280 mm |
| Max Magnification | 0.24x | 1:4.8★ |
Pros & Cons
Canon L-series EF 17-40mm f/4L USM 40mm
- Strong af (93rd percentile)93rd %ile
- Strong social proof (81st percentile)81st %ile
- Strong optical (78th percentile)
- Strong versatility (76th percentile)
- Below average bokeh (14th percentile)14th %ile
- Below average aperture (22nd percentile)
- Below average stabilization (34th percentile)
Sigma Art 17-40mm f/1.8 DC
- Strong user sentiment (98th percentile)98th %ile
- Strong bokeh (97th percentile)97th %ile
- Strong optical (97th percentile)97th %ile
- Strong aperture (95th percentile)95th %ile
- Below average stabilization (34th percentile)
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 4 of 21 specs.