Sigma Contemporary 18-50mm f/2.8 DC DN
Sigma
99 综合评分
vs
Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm
Pentax
86 综合评分
买家怎么说
Sigma Contemporary 18-50mm f/2.8 DC DN
88 满分 100 置信度高 91 条评价
Sigma 18-50mm f/2.8 DC DN Contemporary 被广泛称赞为 APS-C 无反相机的一款紧凑、轻便且锐利的标准变焦镜头。用户一致强调其出色的图像质量、快速的 f/2.8 光圈和实惠的价格是主要优势，使其成为套机镜头的热门升级选择。常见的批评包括缺乏光学防抖和遮光罩设计不佳，但总体情绪极为积极。
优点
- 出色的图像锐度
- 紧凑轻巧的设计
- 快速恒定的 f/2.8 光圈
- 物超所值
- 快速安静的自动对焦
缺点
- 无光学防抖
- 遮光罩设计不佳
- 无防尘防滴
- 塑料制造工艺
- 变焦环方向与富士相反
Image quality 25
Build quality 12
Value for money 18
Size and weight 20
Autofocus performance 10
Stabilization 8
Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm
82 满分 100 置信度中 24 条评价
宾得HD DA 20-40mm f/2.8-4 ED Limited DC WR镜头因其出色的做工质量、锐度和美丽的色彩还原而备受赞誉。用户喜欢它作为街拍和风景摄影的多功能挂机镜头，尤其是在K-3等APS-C机身上。主要缺点是可变光圈和许多人认为相对于套机镜头的性能提升而言价格过高。
优点
- 出色的做工质量
- 优秀的锐度
- 美丽的色彩还原
- 防尘防滴
- 适合街拍和风景的多功能焦段
缺点
- 可变光圈 (f/2.8-4)
- 性能提升价格过高
- 变焦范围有限
- 不如某些套机镜头广角
Build quality 8
Sharpness 7
Color rendition 5
Value for money 4
Weather resistance 3
Variable aperture 3
评分
Travel
Budget
Street
Professional
Portrait
Macro
Video Cinema
Landscape
Wildlife Sports
规格
| 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 |
优缺点
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
价格
Sigma Contemporary 18-50mm f/2.8 DC DN0.008每美元得分
vs
Pentax HD DA 20-40mm F2.8-4 Limited DC WR Wide Zoom 40mm0.006每美元得分
Sigma Contemporary 18-50mm f/2.8 DC DN 性价比高 1.3 倍
结论
胜出: Sigma Contemporary 18-50mm f/2.8 DC DN
Scores 99 overall, wins 9 of 9 usage categories and 3 of 21 specs.
