Samyang AF 50mm f/1.4 AS UMC 50mm
The f/1.4 maximum aperture combined with hybrid aspherical and ED elements delivers sharp, color-accurate images with strong low-light performance and shallow depth of field control. Its Ultra Multi-Coating effectively suppresses ghosting and flare, while the internal focusing design keeps the 77mm filter thread from rotating during use. This manual-focus lens is best for portrait and macro photographers on Pentax KAF systems who prioritize optical quality and smooth bokeh over autofocus convenience.
概览
用户评价
用户口碑如何随时间变化
独家依据客户实际撰写评价的时间--让你看到最初的好评是否持续。
- Q2 202283/100
Buyers praised the lens for sharpness, fast autofocus, and image quality rivaling pricier options, though vignetting was noted.
- Sharpness and image quality comparable to expensive lenses.
- Fast and accurate autofocus.
- Vignetting present but fixable in post-processing.
- Great value for the price.
- Q4 202195/100
Buyers praised the lens for excellent image quality and fun manual aperture ring, noting focus requires practice but delivers great results for the price.
- Excellent image quality, among the best of all lenses owned.
- Manual aperture ring adds fun and functionality, reminiscent of Fuji lenses.
- Focus takes practice but improves with use; 8/10 hit rate on cats.
- Great value for the price, cheaper end of cost spectrum.
基于 17 条带日期的客户评价，按日历季度分组。分期分析为英文。
实测数据
性能表现
规格参数
完整规格参数
Optics
| Type | Prime |
| Focal Length Min | 50 |
| Focal Length Max | 50 |
| Elements | 9 |
| Groups | 6 |
| Aspherical Elements | 1 |
| ED Elements | 1 |
| Coating | Ultra Multi-Coating |
Aperture
| Max Aperture | f/22 |
| Min Aperture | f/1.4 |
| Constant | No |
| Diaphragm Blades | 8 |
Build
| Mount | Canon EF |
| Format | full-frame |
| Weather Sealed | No |
| Weight | 0.5 kg / 1.2 lbs |
| Filter Thread | 77 |
AF & Stabilization
| AF Type | manual focus only |
| Stabilization | No |
Focus
| Min Focus Distance | 450 |
| Max Magnification | 1:6.25 |
竞品对比
| Spec | Samyang AF 50mm f/1.4 AS UMC 50mm | Sigma Contemporary 16-300mm f/3.5-6.7 DC OS | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS |
|---|---|---|---|---|---|---|
| Focal Length | 50mm | 16-300mm | 17-70mm | 17-28mm | 12-35mm | 18-135mm |
| Max Aperture | f/22 | f/3.5 | f/2.8 | f/2.8 | f/2.8 | f/3.5 |
| Mount | Canon EF | Sony E | Sony E | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | true | true | false | true | true |
| Weather Sealed | false | true | true | true | true | false |
| Weight (g) | 544 | 615 | 544 | 450 | 306 | 326 |
| AF Type | manual focus only | HLA | RXD | Stepping Motor | Autofocus | Linear motor |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| 产品 | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | 用户口碑 | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Samyang AF 50mm f/1.4 AS UMC 50mm | 13.2 | 17.9 | 50.9 | 60.5 | 58.9 | 19.8 | 44.7 | 33.7 | 55.3 | 36.8 |
| Sigma Contemporary 16-300mm f/3.5-6.7 DC OS Compare | 53.8 | 84.5 | 64.2 | 87.4 | 99.2 | 76.6 | 0 | 99.6 | 81.9 | 99.2 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.8 | 86.4 | 69.1 | 85.5 | 91.2 | 83.3 | 63.8 | 89.6 | 86.1 | 82.4 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 86.8 | 86.4 | 75.6 | 85.5 | 88.3 | 83.3 | 91.2 | 68.1 | 71 | 36.8 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.8 | 81.1 | 85.7 | 50.7 | 86.6 | 83.3 | 63.8 | 80.6 | 86.1 | 96.9 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98 | 74.6 | 73 | 40.3 | 78.7 | 76.6 | 44.7 | 95.8 | 90.2 | 82.4 |
价格
性价比分析
我们自 2026年5月25日 起追踪该产品的价格。数据增多后将显示图表。
