Sigma Art 17-40mm f/1.8 DC
Canon L-Series RF 20mm f/1.4 L VCM 20mm
What Buyers Say
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
Canon L-Series RF 20mm f/1.4 L VCM 20mm
This Canon RF lens lineup receives overwhelmingly positive feedback, with users praising exceptional sharpness, fast and silent autofocus, and a lightweight, compact design that is ideal for both photography and video. Many reviewers highlight its outstanding performance for astrophotography, noting minimal coma and excellent star rendering wide open. A few criticisms mention heavy reliance on digital corrections, noticeable uncorrected vignetting, and some distortion, but these are generally seen as acceptable trade-offs for the size, weight, and price. Overall, it is considered a significant upgrade over older EF lenses and a top choice for hybrid shooters.
Pros
- Exceptional sharpness
- Fast and silent autofocus
- Lightweight and compact design
- Excellent for astrophotography
- Minimal coma and aberrations
Cons
- Heavy reliance on digital corrections
- Noticeable uncorrected vignetting
- Some distortion and color fringing
- No image stabilization
- Loose, clunking elements (one report)
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | Canon L-Series RF 20mm f/1.4 L VCM 20mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 17 mm | 20 mm |
| Focal Length Max | 40 mm | 20 mm |
| Elements | 17 | 15 |
| Groups | 11 | 11 |
| Aspherical Elements | 4★ | 2 |
| ED Elements | 4★ | 3 |
| Coating | Super Multi-Layer Coating | Canon SSC (Super Spectra Coating); SWC (Sub-Wavelength structure coating; ASC (Air Sphere Coating); Fluorine protective coating on front element |
| Aperture | ||
| Max Aperture | f/1.8 | f/16 |
| Min Aperture | f/1.8 | f/1.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 11 | 11 |
| Build | ||
| Mount | Fujifilm X | Canon RF |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.54 kg | 0.52 kg★ |
| Filter Thread | 67 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | VCM |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm | 200 mm★ |
| Max Magnification | 1:4.8★ | 0.19x |
Pros & Cons
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)
Canon L-Series RF 20mm f/1.4 L VCM 20mm
- Strong optical (88th percentile)88th %ile
- Strong build (68th percentile)
- Below average versatility (33rd percentile)
- Below average stabilization (34th percentile)
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 3 of 21 specs.