Sigma Art 17-40mm f/1.8 DC
Sirui Saturn RF50B-A 50mm
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
Sirui Saturn RF50B-A 50mm
This anamorphic lens is praised for its cinematic look, compact build, and great value. Users love the fun, John Wick-style footage it produces, though some note that the flare effect is subtler than expected and requires aperture adjustment. A few mention compatibility issues with magnetic filter systems.
Pros
- Cinematic anamorphic look
- Compact and lightweight build
- Great value for money
- Fun to use for creative footage
- Good build quality
Cons
- Flare effect subtler than expected
- Aperture adjustment needed for strong flare
- Compatibility issues with magnetic filters
- Vignetting with some filter systems
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | Sirui Saturn RF50B-A 50mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 17 mm | 50 mm |
| Focal Length Max | 40 mm | 50 mm |
| Elements | 17 | 17 |
| Groups | 11 | 12 |
| Aspherical Elements | 4★ | — |
| ED Elements | 4★ | — |
| Coating | Super Multi-Layer Coating | — |
| Aperture | ||
| Max Aperture | f/1.8 | T16 |
| Min Aperture | f/1.8 | T2.9 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 11★ | 10 |
| Build | ||
| Mount | Fujifilm X | Canon RF |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓★ | — |
| Weight | 0.54 kg | 0.47 kg★ |
| Filter Thread | 67 mm | 62 mm |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | Manual Focus |
| Stabilization | ✗ | ✓★ |
| Focus | ||
| Min Focus Distance | 280 mm★ | 900 mm |
| Max Magnification | 1:4.8 | 1:16.2 |
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)
Sirui Saturn RF50B-A 50mm
- Strong user sentiment (82nd percentile)82nd %ile
- Strong stabilization (79th percentile)
- Strong optical (68th percentile)
- Below average af (15th percentile)15th %ile
- Below average versatility (33rd percentile)
Pricing
Sigma Art 17-40mm f/1.8 DC offers 1.9x better value for money
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 5 of 21 specs.
