Sigma Art 17-40mm f/1.8 DC
Pentax DA 21987 35mm
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
Pentax DA 21987 35mm
This Pentax 35mm f/2.4 lens is widely praised for its sharpness, color rendition, and value for money. Users consistently note that it outperforms its price point, with many calling it a bargain and a great walk-around lens. The main criticisms are the plastic build and mount, lack of a lens hood, and limited manual focus control, but these are often seen as acceptable trade-offs for the price. Overall, it's highly recommended for Pentax DSLR users seeking an affordable prime.
Pros
- Sharp image quality
- Excellent value for money
- Compact and lightweight
- Good color rendition
- Fast autofocus
Cons
- Plastic build and mount
- No lens hood included
- Limited manual focus control
- No aperture ring
- Not weather-sealed
Scores
Specifications
| Sigma Art 17-40mm f/1.8 DC | Pentax DA 21987 35mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 17 mm | 35 mm |
| Focal Length Max | 40 mm | 35 mm |
| Elements | 17 | 6 |
| Groups | 11 | 5 |
| Aspherical Elements | 4★ | 1 |
| ED Elements | 4★ | — |
| Coating | Super Multi-Layer Coating | PENTAX Super Protect (SP) coating |
| Aperture | ||
| Max Aperture | f/1.8 | f/22 |
| Min Aperture | f/1.8 | f/2.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 11★ | 6 |
| Build | ||
| Mount | Fujifilm X | Pentax K |
| Format | APS-C | APS-C |
| Weather Sealed | ✓★ | ✗ |
| Weight | 0.54 kg | 0.13 kg★ |
| Filter Thread | 67 mm | 49 mm |
| AF & Stabilization | ||
| AF Type | HLA (High-response Linear Actuator) | Autofocus |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 280 mm★ | 300 mm |
| Max Magnification | 1:4.8★ | 0.17x |
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)
Pentax DA 21987 35mm
- Strong build (93rd percentile)93rd %ile
- Strong social proof (81st percentile)81st %ile
- Below average bokeh (6th percentile)6th %ile
- Below average aperture (22nd percentile)
- Below average versatility (33rd percentile)
- Below average stabilization (34th percentile)
Pricing
Pentax DA 21987 35mm offers 2.0x better value for money
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 6 of 21 specs.
