Sigma Contemporary 18-50mm f/2.8 DC DN
Sigma
94 综合评分
vs
Rokinon AF 50mm f/1.4 50mm
Rokinon
37 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
Rokinon AF 50mm f/1.4 50mm
78 满分 100 置信度高 30 条评价
Rokinon 50mm f/1.4镜头因其出色的性价比、锐利的光学素质和坚固的做工而获得普遍好评，尤其适合天文摄影和弱光环境。然而，许多用户指出自动对焦不稳定，对快速移动的物体不可靠，部分镜头还存在偏心问题。该镜头在某些卡口上为全手动操作，购买时需注意。
优点
- 性价比极高
- 价格下锐利的光学素质
- 坚固的全金属结构
- 非常适合天文摄影
- f/1.4下低光性能良好
缺点
- 自动对焦不稳定
- 自动对焦对快速移动物体不可靠
- 部分镜头有偏心问题
- f/1.4时边缘画质偏软
- 某些卡口上为全手动
Value for money 8
Image quality 12
Build quality 6
Autofocus performance 7
Astrophotography suitability 5
Low light performance 4
评分
Travel
Street
Budget
Professional
Portrait
Macro
Video Cinema
Landscape
Wildlife Sports
规格
| Sigma Contemporary 18-50mm f/2.8 DC DN | Rokinon AF 50mm f/1.4 50mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 18 mm | 50 mm |
| Focal Length Max | 50 mm | 50 mm |
| Elements | 13 | 9 |
| Groups | 10 | 6 |
| Aspherical Elements | 3★ | 2 |
| ED Elements | 1 | 1 |
| Coating | Super Multi-Layer Coating | Ultra Multi-Coating |
| Aperture | ||
| Max Aperture | f/2.8 | f/1.4 |
| Min Aperture | f/2.8 | f/1.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 7 | 8★ |
| Build | ||
| Mount | Sony E | Sony E |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.29 kg★ | 0.42 kg |
| Filter Thread | 55 mm | 77 mm |
| AF & Stabilization | ||
| AF Type | stepping motor★ | manual focus only |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 121 mm★ | 450 mm |
| Max Magnification | 1:2.8 | 1:6.25 |
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
- Below average stabilization (35th percentile)
Rokinon AF 50mm f/1.4 50mm
- Strong build (76th percentile)
- Below average af (14th percentile)14th %ile
- Below average bokeh (19th percentile)19th %ile
- Below average aperture (22nd percentile)
- Below average user sentiment (30th percentile)
价格
结论
胜出: Sigma Contemporary 18-50mm f/2.8 DC DN
Scores 94 overall, wins 9 of 9 usage categories and 4 of 21 specs.
