Sigma Art 17-40mm f/1.8 DC
Rokinon IO2470AFZ 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
Rokinon IO2470AFZ 70mm
This lens has received overwhelmingly negative feedback due to severe build quality issues. Multiple verified buyers report that the lens mount breaks off within days or months, often due to tiny screws stripping plastic threads. Users also criticize Rokinon's poor customer support, with some unable to get replacements or repairs. A few Q&A responses note decent optical quality, but the structural failures make this lens unreliable.
Pros
- Decent optical quality
- Good value for money initially
Cons
- Lens mount breaks easily
- Poor build quality with plastic threads
- Terrible customer support
- Screws strip and fall out
- Lens falls off camera
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | Rokinon IO2470AFZ 70mm | |
|---|---|---|
| Optics | ||
| Type | zoom | zoom |
| Focal Length Min | 17 mm | 24 mm |
| Focal Length Max | 40 mm | 70 mm |
| Elements | 17 | 17 |
| Groups | 11 | 14 |
| Aspherical Elements | 4★ | 2 |
| ED Elements | 4★ | 3 |
| Coating | Super Multi-Layer Coating | UMC Coating |
| Aperture | ||
| Max Aperture | f/1.8 | f/22 |
| Min Aperture | f/1.8 | f/2.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 11★ | 9 |
| Build | ||
| Mount | Fujifilm X | Sony E |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.54 kg★ | 1.10 kg |
| Filter Thread | 67 mm | 82 mm |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | LSM (Linear Sonic Motor) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm★ | 350 mm |
| Max Magnification | 1:4.8 | 1:3.7 |
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 IO2470AFZ 70mm
- Strong optical (94th percentile)94th %ile
- Strong versatility (81st percentile)81st %ile
- Below average user sentiment (0th percentile)0th %ile
- Below average social proof (5th percentile)5th %ile
- Below average aperture (22nd percentile)
- Below average bokeh (25th percentile)
Pricing
Sigma Art 17-40mm f/1.8 DC offers 2.5x better value for money
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 5 of 21 specs.
