Sigma Art 17-40mm f/1.8 DC
IRIX Firefly IL-15FF-EF 15mm
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
IRIX Firefly IL-15FF-EF 15mm
Overall, the Rokinon 14mm f/2.8 lens is well-regarded by hobbyist and astrophotography users for its value and image quality, though some report softness and chromatic issues. Verified buyers praise its sharpness for stars and solid build, especially with Canon R6 and BMPCC 6K cameras. However, a long-term user warns it is not suitable for professional work due to intentional softness. The Q&A indicates compatibility concerns with certain Canon and Sony models, but general satisfaction remains high among non-professionals.
Pros
- Good value for money
- Sharp stars for astrophotography
- Solid build quality
- Great for landscape and astro
- Fast aperture f/2.8
Cons
- Softness in some copies
- Some chromatic aberration reported
- Blurry stars in astro shots
- Not suitable for professional work
- Compatibility issues with some Canon/Sony bodies
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | IRIX Firefly IL-15FF-EF 15mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 17 mm | 15 mm |
| Focal Length Max | 40 mm | 15 mm |
| Elements | 17 | 15 |
| Groups | 11 | 11 |
| Aspherical Elements | 4★ | 2 |
| ED Elements | 4 | 5★ |
| Coating | Super Multi-Layer Coating | Neutrino coating |
| Aperture | ||
| Max Aperture | f/1.8 | f/22 |
| Min Aperture | f/1.8 | f/2.4 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | 11★ | 9 |
| Build | ||
| Mount | Fujifilm X | Canon EF |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.54 kg★ | 0.60 kg |
| Filter Thread | 67 mm | 95 mm |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | Manual Focus |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm | 280 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)
IRIX Firefly IL-15FF-EF 15mm
- Strong optical (93rd percentile)93rd %ile
- Strong macro (72nd percentile)
- Strong social proof (66th percentile)
- Below average af (15th percentile)15th %ile
- Below average user sentiment (17th percentile)17th %ile
- Below average aperture (22nd percentile)
- Below average bokeh (25th percentile)
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 5 of 21 specs.