Sigma Art 17-40mm f/1.8 DC
Sony DT SAL1870 18-70mm
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
Sony DT SAL1870 18-70mm
This Sony 18-70mm kit lens receives mixed reviews, with many praising its value, clarity, and quick autofocus for general photography. However, several users report durability issues, particularly with the plastic mount and softness at maximum zoom, leading to two failed copies for one buyer. Overall, it is seen as an affordable, lightweight option for casual use but not a professional-grade lens.
Pros
- Great value for money
- Fast autofocus
- Good clarity and color
- Lightweight and compact
- Works well for general photography
Cons
- Fragile plastic mount
- Soft at maximum zoom
- Durability issues (multiple failures)
- Not sharp throughout zoom range
- Auto focus can fail after impact
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | Sony DT SAL1870 18-70mm | |
|---|---|---|
| Optics | ||
| Type | zoom | zoom |
| Focal Length Min | 17 mm | 18 mm |
| Focal Length Max | 40 mm | 70 mm |
| Elements | 17 | — |
| Groups | 11 | — |
| Aspherical Elements | 4★ | 1 |
| ED Elements | 4★ | 1 |
| Coating | Super Multi-Layer Coating | — |
| Aperture | ||
| Max Aperture | f/1.8 | f/3.5 |
| Min Aperture | f/1.8 | 3.5-5.6 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | 11★ | — |
| Build | ||
| Mount | Fujifilm X | Sony A |
| Format | APS-C | APS-C |
| Weather Sealed | ✓★ | — |
| Weight | 0.54 kg | 0.23 kg★ |
| Filter Thread | 67 mm | — |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | — |
| Stabilization | ✗ | — |
| Focus | ||
| Min Focus Distance | 280 mm | 35 mm★ |
| Max Magnification | 1:4.8★ | — |
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)
Sony DT SAL1870 18-70mm
- Strong macro (97th percentile)97th %ile
- Strong versatility (87th percentile)87th %ile
- Strong aperture (83rd percentile)83rd %ile
- Strong bokeh (81st percentile)81st %ile
- Below average user sentiment (11th percentile)11th %ile
- Below average stabilization (34th percentile)
Verdict
Scores 97 overall, wins 9 of 9 usage categories and 6 of 21 specs.