Sigma Art 17-40mm f/1.8 DC
Rokinon 21mm f/1.4 21mm
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
Rokinon 21mm f/1.4 21mm
The lens is praised as a great upgrade for the Sony a6000, especially for street photography. However, it is noted to be somewhat heavy and one user hasn't fully tested image quality yet. A Q&A confirms it is manual focus only and compatible with full-frame Sony A7II.
Pros
- Great upgrade for a6000
- Well-constructed build
- Suitable for street photography
Cons
- Heavier than desired
- Untested image quality
- Manual focus only
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | Rokinon 21mm f/1.4 21mm | |
|---|---|---|
| Optics | ||
| Type | zoom | wide-angle |
| Focal Length Min | 17 mm | 21 mm |
| Focal Length Max | 40 mm | 21 mm |
| Elements | 17 | 8 |
| Groups | 11 | 7 |
| Aspherical Elements | 4★ | 3 |
| ED Elements | 4★ | 1 |
| Coating | Super Multi-Layer Coating | Ultra Multi Coating |
| Aperture | ||
| Max Aperture | f/1.8 | f/1.4 |
| Min Aperture | f/1.8 | f/1.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 11★ | 9 |
| Build | ||
| Mount | Fujifilm X | Sony E |
| Format | APS-C | APS-C |
| Weather Sealed | ✓★ | — |
| Weight | 0.54 kg | 0.28 kg★ |
| Filter Thread | 67 mm | 58 mm |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | manual focus only |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm★ | 300 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)
Rokinon 21mm f/1.4 21mm
- Strong aperture (98th percentile)98th %ile
- Strong bokeh (97th percentile)97th %ile
- Strong build (76th percentile)
- Strong macro (69th percentile)
- Below average user sentiment (5th percentile)5th %ile
- Below average social proof (13th percentile)13th %ile
- Below average af (15th percentile)15th %ile
- Below average versatility (33rd percentile)
Pricing
Rokinon 21mm f/1.4 21mm offers 1.4x better value for money
Verdict
Scores 97 overall, wins 9 of 9 usage categories and 6 of 21 specs.
