Sigma EX DC 10-20mm f/4-5.6D
An ultrawide 10-20mm zoom with a constant f/4-5.6 aperture, it uses three aspherical and three SLD elements to fight distortion and color fringing, driven by a fast, quiet HSM autofocus motor with full-time manual override. Its internal focusing keeps the front element fixed, making polarizer use seamless and optical quality consistent at any distance. It suits budget-conscious landscape and architecture photographers who need a sharp, portable wide-angle lens for APS-C DSLRs.
Focal length 10-20mm
Aperture f/4
Mount Sony A
Weight 465 g
af type Internal Focusing (IF)
lens type zoom
70 Overall Score
Price CA$795
Snapshot
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Owner sentiment has improved over time
Based on 14 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Zoom |
| Focal Length Min | 10 |
| Focal Length Max | 20 |
| Elements | 14 |
| Groups | 10 |
| Aspherical Elements | 2 |
| ED Elements | 3 |
| Coating | Multilayer lens coating |
Aperture
| Max Aperture | f/4 |
| Min Aperture | 4-5.6 |
| Constant | No |
| Diaphragm Blades | 6 |
Build
| Mount | Sony A |
| Format | APS-C |
| Weather Sealed | No |
| Weight | 0.5 kg / 1.0 lbs |
| Filter Thread | 77 |
AF & Stabilization
| AF Type | Internal Focusing (IF) |
| Stabilization | No |
Focus
| Min Focus Distance | 240 |
| Max Magnification | 1:6.7 |
vs Competition
| Spec | Sigma EX DC 10-20mm f/4-5.6D | Tamron Di III VC 28-300mm f/4-7.1 VXD | 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 | 10-20mm | 28-300mm | 17-28mm | 12-35mm | 18-135mm | 27mm |
| Max Aperture | f/4 | f/4 | f/2.8 | f/2.8 | f/3.5 | f/1.2 |
| Mount | Sony A | 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) | 465 | 590 | 450 | 306 | 326 | 560 |
| AF Type | Internal Focusing (IF) | VXD linear motor | Stepping Motor | Autofocus | Linear motor | STM |
| Lens Type | zoom | zoom | zoom | zoom | zoom | prime |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma EX DC 10-20mm f/4-5.6D | 53.9 | 54.2 | 58.3 | 79.9 | 85.8 | 66 | 72.2 | 77.7 | 36.8 |
| Tamron Di III VC 28-300mm f/4-7.1 VXD Compare | 98 | 77.9 | 65.1 | 85.8 | 96.7 | 66 | 97.7 | 55.8 | 82.4 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 86.8 | 87 | 75.2 | 85.8 | 88.2 | 83.9 | 68 | 69.8 | 36.8 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.9 | 81.8 | 85.4 | 51 | 86.5 | 83.9 | 80.6 | 85.5 | 96.9 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98 | 75.4 | 72.5 | 40.3 | 78.5 | 77.3 | 95.8 | 89.8 | 82.4 |
| Viltrox Pro AF 27mm f/1.2 Compare | 86.8 | 98.5 | 67.4 | 38.5 | 82.2 | 98.6 | 33.6 | 89.8 | 36.8 |
Price
Value & Pricing
From CA$795
