Canon L EF 17-40mm f/4L USM
Canon
61 Overall Score
vs
Yongnuo YN 56mm f/1.4S DA DSM WL Pro 56mm
Yongnuo
52 Overall Score
What Buyers Say
Canon L EF 17-40mm f/4L USM
No customer feedback yet
Yongnuo YN 56mm f/1.4S DA DSM WL Pro 56mm
85 out of 100 medium confidence 18 reviews
This Sony 70-200mm f/2.8 GM II lens receives high praise for its sharpness, fast autofocus, and excellent low-light performance, especially for video work. Verified buyers call it a worthy upgrade with solid build quality. However, several questions raise concerns about loose internal parts that shift audibly when the lens is off or unattached, causing some to worry about long-term durability.
Pros
- Sharp image quality
- Fast autofocus
- Excellent low-light performance
- Great for video work
- Solid build quality
Cons
- Loose internal parts making noise
- Durability concerns from shifting internals
- Potential defect in early units
- Uncertainty about long-term build quality
Image quality 6
Autofocus performance 5
Low light performance 4
Build quality 5
Internal parts looseness 4
Video quality 3
Scores
Travel
Landscape
Budget
Professional
Wildlife Sports
Street
Video Cinema
Macro
Portrait
Specifications
| Canon L EF 17-40mm f/4L USM | Yongnuo YN 56mm f/1.4S DA DSM WL Pro 56mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 17 mm | 56 mm |
| Focal Length Max | 40 mm | 56 mm |
| Elements | 12 | 10 |
| Groups | 9 | 9 |
| Aspherical Elements | 3★ | — |
| ED Elements | 1★ | — |
| Coating | Super Spectra coating | Multilayer Nano Coating, Anti-Fouling Fluorine Coating |
| Aperture | ||
| Max Aperture | f/22 | f/16 |
| Min Aperture | f/4 | f/1.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 7 | 9★ |
| Build | ||
| Mount | Canon EF | Sony E |
| Format | full-frame★ | APS-C |
| Weather Sealed | ✓★ | — |
| Weight | 0.50 kg | 0.37 kg★ |
| Filter Thread | 77 mm | 58 mm |
| AF & Stabilization | ||
| AF Type | USM★ | Digital Stepping Motor (DSM) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm★ | 579 mm |
| Max Magnification | 0.24x | 1:9.09★ |
Pros & Cons
Canon L EF 17-40mm f/4L USM
- Strong af (93rd percentile)93rd %ile
- Strong social proof (86th percentile)86th %ile
- Strong optical (78th percentile)
- Strong versatility (76th percentile)
- Below average bokeh (14th percentile)14th %ile
- Below average aperture (22nd percentile)
- Below average stabilization (35th percentile)
Yongnuo YN 56mm f/1.4S DA DSM WL Pro 56mm
- Strong social proof (99th percentile)99th %ile
- Strong af (85th percentile)85th %ile
- Strong user sentiment (66th percentile)
- Strong build (66th percentile)
- Below average versatility (33rd percentile)
- Below average stabilization (35th percentile)
Pricing
Canon L EF 17-40mm f/4L USM0.149score per dollar
vs
Yongnuo YN 56mm f/1.4S DA DSM WL Pro 56mm0.288score per dollar
Yongnuo YN 56mm f/1.4S DA DSM WL Pro 56mm offers 1.9x better value for money
Verdict
Winner: Canon L EF 17-40mm f/4L USM
Scores 61 overall, wins 7 of 9 usage categories and 6 of 21 specs.
