Pentax D FA 28-105MM F3.5-5.6ED DC WR
Sigma Art 17-40mm f/1.8 DC
What Buyers Say
Pentax D FA 28-105MM F3.5-5.6ED DC WR
The Pentax HD D FA 28-105mm f/3.5-5.6 ED DC WR lens is widely praised as an exceptional value, delivering sharpness and clarity that rivals or exceeds more expensive zooms like the 24-70mm f/2.8. Users consistently highlight its compact size, light weight, weather resistance, and versatile focal range as ideal for travel and everyday photography on full-frame K-1 cameras. While a few note the variable aperture as a minor limitation, the consensus is that this lens punches far above its price point and is a no-brainer for Pentax shooters.
Pros
- Exceptional sharpness for the price
- Compact and lightweight design
- Weather-resistant construction
- Versatile 28-105mm focal range
- Great value for money
Cons
- Variable aperture (f/3.5-5.6)
- Slightly narrow at wide end (28mm vs 24mm)
- Zoom ring requires slight effort
- No infinity focus indicator
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
Scores
Specifications
| Pentax D FA 28-105MM F3.5-5.6ED DC WR | Sigma Art 17-40mm f/1.8 DC | |
|---|---|---|
| Optics | ||
| Type | zoom | zoom |
| Focal Length Min | 28 mm | 17 mm |
| Focal Length Max | 105 mm | 40 mm |
| Elements | 15 | 17 |
| Groups | 11 | 11 |
| Aspherical Elements | — | 4★ |
| ED Elements | — | 4★ |
| Coating | Super Protect & HD Multi-Layer Coatings | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | 22-32★ | f/1.8 |
| Min Aperture | 3.5-5.6 | f/1.8 |
| Constant | ✗ | ✓★ |
| Diaphragm Blades | 9 | 11★ |
| Build | ||
| Mount | Pentax K | Fujifilm X |
| Format | full-frame★ | APS-C |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.44 kg★ | 0.54 kg |
| Filter Thread | 62 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | Supersonic Direct-Drive AF Motor | HLA (High-response Linear Actuator) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 500 mm | 280 mm★ |
| Max Magnification | 1:4.55 | 1:4.8 |
Pros & Cons
Pentax D FA 28-105MM F3.5-5.6ED DC WR
- Strong versatility (86th percentile)86th %ile
- Strong social proof (77th percentile)
- Strong build (75th percentile)
- Strong optical (69th percentile)
- Below average aperture (22nd percentile)
- Below average bokeh (25th percentile)
- Below average stabilization (34th percentile)
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)
Pricing
Verdict
Scores 97 overall, wins 9 of 9 usage categories and 5 of 21 specs.
