Rokinon RK20M-C 20mm
The bright f/1.8 maximum aperture combined with two aspherical and three ED elements delivers strong sharpness and contrast for full-frame Nikon F-mount DSLRs. Its manual focus design and Ultra Multi-Coating provide a tactile, flare-resistant shooting experience at a budget-friendly price point. This lens is best for landscape and astrophotography enthusiasts who prioritize a fast wide-angle prime and don't require autofocus.
Focal length 20mm
Aperture f/22
Mount Canon EF
Weight 499 g
af type manual focus only
lens type prime
43 综合评分
价格 JP¥0
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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 | 20 |
| Focal Length Max | 20 |
| Elements | 13 |
| Groups | 12 |
| Aspherical Elements | 2 |
| ED Elements | 3 |
| Coating | Ultra Multi-Coating |
Aperture
| Max Aperture | f/22 |
| Min Aperture | f/1.8 |
| Constant | No |
| Diaphragm Blades | 7 |
Build
| Mount | Canon EF |
| Format | full-frame |
| Weather Sealed | No |
| Weight | 0.5 kg / 1.1 lbs |
| Filter Thread | 77 |
AF & Stabilization
| AF Type | manual focus only |
| Stabilization | No |
Focus
| Min Focus Distance | 200 |
竞品对比
| Spec | Rokinon RK20M-C 20mm | Sigma Contemporary 18-50mm f/2.8 DC DN | 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 PZ 16-50mm f/3.5-5.6 OSS |
|---|---|---|---|---|---|---|
| Focal Length | 20mm | 18-50mm | 17-70mm | 17-28mm | 12-35mm | 16-50mm |
| Max Aperture | f/22 | f/2.8 | 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 | false | true | false | true | true |
| Weather Sealed | false | true | true | true | true | true |
| Weight (g) | 499 | 290 | 544 | 450 | 306 | 107 |
| AF Type | manual focus only | stepping motor | RXD | Stepping Motor | Autofocus | Autofocus |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Rokinon RK20M-C 20mm | 12.7 | 13.2 | 57.2 | 82.7 | 86 | 20.1 | 63.5 | 33.6 | 42 | 36.7 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 87.6 | 80.4 | 86.5 | 90.8 | 82.5 | 82.8 | 80.5 | 78.5 | 90.1 | 36.7 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.7 | 85.7 | 69.8 | 84.9 | 91 | 82.8 | 63.5 | 89.4 | 86 | 82.4 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.6 | 85.7 | 76 | 84.9 | 88.4 | 82.8 | 90.8 | 68 | 71.4 | 36.7 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.7 | 80.4 | 85.8 | 50.2 | 86.7 | 82.8 | 63.5 | 80.4 | 86 | 97 |
| Sony E PZ 16-50mm f/3.5-5.6 OSS Compare | 53.7 | 73.7 | 98.6 | 43.2 | 69 | 75.9 | 63.5 | 83.1 | 82 | 93.5 |
