Samyang AF 50mm f/1.4 AS UMC 50mm
The f/1.4 maximum aperture combined with an aspherical element delivers strong low-light performance and shallow depth of field control on full-frame Pentax K bodies. Its Ultra Multi-Coating effectively suppresses flare and ghosting, while the manual focus design provides a tactile, precise experience for deliberate composition. This lens is best for Pentax photographers who prioritize affordable, fast-aperture optics for portraiture and low-light work over autofocus convenience.
Focal length 50mm
Aperture f/22
Mount Canon EF
Weight 544 g
af type manual focus only
lens type prime
33 综合评分
价格 MX$5,270
概览
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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 | Nikon NIKKOR Z DX 18-140mm f/3.5-6.3 VR | Tamron Di III 28-75mm f/2.8 VXD G2 | Sigma Contemporary 10-18mm f/2.8 DC DN | Canon RF 28-70mm f/2.8 IS STM | Sony G SELP28135G.SYX |
|---|---|---|---|---|---|---|
| Focal Length | 50mm | 18-140mm | 28-75mm | 10-18mm | 28-70mm | 28-135mm |
| Max Aperture | f/22 | f/3.5 | f/2.8 | f/2.8 | f/22 | f/4 |
| Mount | Canon EF | Nikon Z | Sony E | Sony E | Canon RF | Sony E |
| Stabilization | false | true | false | false | true | true |
| Weather Sealed | false | true | true | true | true | true |
| Weight (g) | 544 | 315 | 540 | 260 | 495 | 420 |
| AF Type | manual focus only | stepping motor | VXD | Autofocus | STM | SSM |
| 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 | 13.9 | 20.2 | 48.6 | 59.2 | 54.8 | 22.6 | 29.8 | 33.6 | 46.1 | 37.9 |
| Nikon NIKKOR Z DX 18-140mm f/3.5-6.3 VR Compare | 86.9 | 77.7 | 83.8 | 82.6 | 88.5 | 79.7 | 0 | 96.2 | 32.2 | 96.6 |
| Tamron Di III 28-75mm f/2.8 VXD G2 Compare | 54.6 | 88 | 67.2 | 87.3 | 87.8 | 85.6 | 80.4 | 78.2 | 83.3 | 37.9 |
| Sigma Contemporary 10-18mm f/2.8 DC DN Compare | 54.6 | 83.4 | 87.1 | 93.3 | 81.5 | 85.6 | 80.4 | 69 | 69.2 | 37.9 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 86.9 | 25.9 | 70.2 | 80.3 | 85 | 22.6 | 98.1 | 77.1 | 88 | 98.5 |
| Sony G SELP28135G.SYX Compare | 94.2 | 80.1 | 75.4 | 31 | 86.9 | 69.8 | 63.3 | 92.3 | 50.6 | 92.8 |
价格
性价比分析
最低 MX$5,270
