Sigma EX DC HSM 4.5mm f/2.8 5mm
The fast f/2.8 aperture and 180-degree circular projection on APS-C sensors make this a specialized tool for low-light scenarios like astrophotography. Its equisolid angle projection method provides quantifiable data for scientific use, while the HSM motor enables quiet autofocus with full-time manual override. This lens is best for aurora photographers and researchers needing precise solid angle measurements of sky or vegetation distribution.
Focal length 4mm
Aperture f/2.8
Mount Canon EF
Weight 472 g
af type HSM
lens type fisheye
47 综合评分
价格 £0
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实测数据
Performance
Specifications
Full Specifications
Optics
| Type | Fisheye |
| Focal Length Min | 4 |
| Focal Length Max | 4 |
| Coating | Super Multi-Layer Coating |
Aperture
| Max Aperture | f/2.8 |
| Min Aperture | f/2.8 |
| Constant | Yes |
Build
| Mount | Canon EF |
| Format | APS-C |
| Weight | 0.5 kg / 1.0 lbs |
AF & Stabilization
| AF Type | HSM |
| Stabilization | No |
Focus
| Min Focus Distance | 135 |
| Max Magnification | 1:6 |
vs Competition
| Spec | Sigma EX DC HSM 4.5mm f/2.8 5mm | 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 | Viltrox Pro AF 27mm f/1.2 |
|---|---|---|---|---|---|---|
| Focal Length | 4mm | 17-70mm | 17-28mm | 12-35mm | 18-135mm | 27mm |
| Max Aperture | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/1.2 |
| Mount | Canon EF | Sony E | Nikon Z | Micro Four Thirds | Sony E | Sony E |
| Stabilization | false | true | false | true | true | false |
| Weather Sealed | false | true | true | true | false | true |
| Weight (g) | 472 | 544 | 450 | 306 | 326 | 560 |
| AF Type | HSM | RXD | Stepping Motor | Autofocus | Linear motor | STM |
| Lens Type | fisheye | zoom | zoom | zoom | zoom | prime |
| Compare | Compare | Compare | Compare | Compare |
| 产品 | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | 用户口碑 | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Sigma EX DC HSM 4.5mm f/2.8 5mm | 53.5 | 80.5 | 43.1 | 89.9 | 45.9 | 82.5 | 7.7 | 33.8 | 63 | 36.8 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.5 | 85.7 | 69.4 | 85.1 | 91.3 | 82.5 | 63.9 | 89.6 | 86.3 | 82.6 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.1 | 85.7 | 76 | 85.1 | 88.5 | 82.5 | 91.1 | 68.3 | 71.6 | 36.8 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.5 | 80.5 | 86 | 50.8 | 86.7 | 82.5 | 63.9 | 80.6 | 86.3 | 97 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98.1 | 73.8 | 73.3 | 40.3 | 78.9 | 75.8 | 44.7 | 95.9 | 90.3 | 82.6 |
| Viltrox Pro AF 27mm f/1.2 Compare | 87.1 | 98.7 | 68.2 | 38.5 | 82.6 | 98.5 | 91.1 | 33.8 | 90.3 | 36.8 |
