Sigma Contemporary 18-50mm f/2.8 DC DN
Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm
What Buyers Say
Sigma Contemporary 18-50mm f/2.8 DC DN
The Sigma 18-50mm f/2.8 DC DN Contemporary is widely praised as a compact, lightweight, and sharp standard zoom for APS-C mirrorless cameras. Users consistently highlight its excellent image quality, fast f/2.8 aperture, and affordable price as major strengths, making it a popular upgrade from kit lenses. Common criticisms include the lack of optical stabilization and a poorly designed lens hood, but overall sentiment is overwhelmingly positive.
Pros
- Excellent image sharpness
- Compact and lightweight design
- Fast f/2.8 constant aperture
- Great value for the price
- Fast and silent autofocus
Cons
- No optical image stabilization
- Poorly designed lens hood
- No weather sealing
- Plastic build quality
- Zoom ring direction opposite to Fujifilm
Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm
The Pentax HD DA 20-40mm f/2.8-4 ED Limited DC WR lens is highly praised for its superb build quality, sharpness, and beautiful color rendition. Users love it as a versatile walk-around lens for street photography and landscapes, especially on APS-C bodies like the K-3. The main drawbacks are its variable aperture and a price that many feel is too high for the performance gain over kit lenses.
Pros
- Superb build quality
- Excellent sharpness
- Beautiful color rendition
- Weather resistant
- Versatile focal range for street and landscape
Cons
- Variable aperture (f/2.8-4)
- High price for performance gain
- Limited zoom range
- Not as wide as some kit lenses
Scores
Specifications
| Sigma Contemporary 18-50mm f/2.8 DC DN | Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm | |
|---|---|---|
| Optics | ||
| Type | zoom | zoom |
| Focal Length Min | 18 mm | 20 mm |
| Focal Length Max | 50 mm | 40 mm |
| Elements | 13 | 9 |
| Groups | 10 | 8 |
| Aspherical Elements | 3★ | 1 |
| ED Elements | 1 | 1 |
| Coating | Super Multi-Layer Coating | HD coating |
| Aperture | ||
| Max Aperture | f/2.8 | f/2.8 |
| Min Aperture | f/2.8 | 2.8-4 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | 7 | 9★ |
| Build | ||
| Mount | Sony E | Pentax K |
| Format | APS-C | APS-C |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.29 kg | 0.28 kg★ |
| Filter Thread | 55 mm | 55 mm |
| AF & Stabilization | ||
| AF Type | stepping motor★ | Autofocus |
| Stabilization | ✗ | ✓★ |
| Focus | ||
| Min Focus Distance | 121 mm | 40 mm★ |
| Max Magnification | 1:2.8 | 1:5 |
Pros & Cons
Sigma Contemporary 18-50mm f/2.8 DC DN
- Strong social proof (91st percentile)91st %ile
- Strong macro (90th percentile)90th %ile
- Strong aperture (86th percentile)86th %ile
- Strong af (85th percentile)85th %ile
Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm
- Strong macro (97th percentile)97th %ile
- Strong bokeh (89th percentile)89th %ile
- Strong aperture (86th percentile)86th %ile
- Strong build (86th percentile)86th %ile
Pricing
Sigma Contemporary 18-50mm f/2.8 DC DN offers 1.2x better value for money
Verdict
Scores 99 overall, wins 9 of 9 usage categories and 3 of 21 specs.
