Canon RF 28-70mm f/2.8 IS STM
Sigma Art 17-40mm f/1.8 DC
What Buyers Say
Canon RF 28-70mm f/2.8 IS STM
The Canon RF 24-70mm f/2.8L IS USM lens receives overwhelmingly positive feedback for its sharpness, fast autofocus, and lightweight design. Users appreciate it as a versatile upgrade from kit lenses, especially for mirrorless cameras like the R7 and R5 Mark II. A single negative review is due to a delivery issue, not product quality.
Pros
- Sharp image quality
- Fast and accurate autofocus
- Lightweight and compact design
- Great value for the price
- Versatile for various settings
Cons
- Possible delivery mismanagement
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 RF 28-70mm f/2.8 IS STM | Sigma Art 17-40mm f/1.8 DC | |
|---|---|---|
| Optics | ||
| Type | zoom | zoom |
| Focal Length Min | 28 mm | 17 mm |
| Focal Length Max | 70 mm | 40 mm |
| Elements | 14 | 17 |
| Groups | 11 | 11 |
| Aspherical Elements | 2 | 4★ |
| ED Elements | 2 | 4★ |
| Coating | Super Spectra Coating (SSC) | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | f/2.8 | f/1.8 |
| Min Aperture | f/2.8 | f/1.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | — | 11★ |
| Build | ||
| Mount | Canon RF | Fujifilm X |
| Format | full-frame★ | APS-C |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.49 kg★ | 0.54 kg |
| Filter Thread | 67 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | STM★ | HLA (High-response Linear Actuator) |
| Stabilization | ✓★ | ✗ |
| Stabilization Stops | 5.5 stops★ | — |
| Focus | ||
| Min Focus Distance | 270 mm★ | 280 mm |
| Max Magnification | 0.24x | 1:4.8★ |
Pros & Cons
Canon RF 28-70mm f/2.8 IS STM
- Strong stabilization (98th percentile)98th %ile
- Strong aperture (88th percentile)88th %ile
- Strong user sentiment (88th percentile)88th %ile
- Strong bokeh (87th percentile)87th %ile
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)
Pricing
Sigma Art 17-40mm f/1.8 DC offers 1.3x better value for money
Verdict
Scores 96 overall, wins 3 of 9 usage categories and 4 of 22 specs.
