Sigma EX DC 10-20mm f/4-5.6 EX DC 10-20mm
Three special low-dispersion glass elements and two aspherical lenses in the 10-20mm zoom produce sharp ultra-wide images with reduced color fringing and distortion. A multilayer coating minimizes flare, while the 24cm minimum focus distance and light 472g build offer versatile close-up framing. This lens suits Sony/Minolta APS-C DSLR shooters who need an affordable, wide perspective for landscapes and interiors.
Focal length 10-20mm
Aperture f/4
Mount Pentax
Weight 465 g
af type Autofocus
lens type zoom
73 Overall Score
Price CA$775
Snapshot
Pros & Cons
Pros
- Strong optical (84th percentile) 84th
- Strong social proof (83th percentile) 83th
- Strong macro (77th percentile) 77th
- Strong versatility (73th percentile) 73th
Cons
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 | Pentax |
| Format | APS-C |
| Weight | 0.5 kg / 1.0 lbs |
| Filter Thread | 77 |
AF & Stabilization
| AF Type | Autofocus |
Focus
| Min Focus Distance | 240 |
| Max Magnification | 1:6.7 |
vs Competition
| Spec | Sigma EX DC 10-20mm f/4-5.6 EX DC 10-20mm | Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD | Nikon NIKKOR Z 28-400mm f/4-8 VR | Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 | Canon EF-S 18-135mm f/3.5-5.6 IS USM | Sony E SELP1650 |
|---|---|---|---|---|---|---|
| Focal Length | 10-20mm | 18-300mm | 28-400mm | 50-200mm | 18-135mm | 16-50mm |
| Max Aperture | f/4 | f/3.5 | f/4 | f/2.8 | f/3.5 | f/3.5 |
| Mount | Pentax | Fuji X | Nikon Z | Micro Four Thirds | Canon EF-S | Sony E |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | false | false | true | true | false | false |
| Weight (g) | 465 | 92 | 726 | 655 | 515 | 116 |
| AF Type | Autofocus | VXD linear motor | STM | linear motor | STM | Stepping motor |
| Lens Type | zoom | zoom | zoom | telephoto | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | Af | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sigma EX DC 10-20mm f/4-5.6 EX DC 10-20mm | 54.8 | 65.7 | 52.5 | 76.9 | 84.1 | 71.8 | 72.9 | 83.1 | 36 |
| Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD Compare | 98.3 | 75.5 | 96.4 | 87.8 | 74.3 | 77.5 | 99.2 | 83.1 | 81.1 |
| Nikon NIKKOR Z 28-400mm f/4-8 VR Compare | 86.6 | 78.4 | 51.1 | 81.2 | 97 | 71.8 | 98.9 | 83.1 | 98.2 |
| Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 Compare | 98.3 | 86.4 | 54.8 | 22.9 | 95.9 | 84 | 88.3 | 65.9 | 96.3 |
| Canon EF-S 18-135mm f/3.5-5.6 IS USM Compare | 86.6 | 75.5 | 46.8 | 33.3 | 79.8 | 77.5 | 96 | 78 | 92.5 |
| Sony E SELP1650 Compare | 86.6 | 75.5 | 93.7 | 35.3 | 64.4 | 77.5 | 83.5 | 74 | 92.5 |
Price
Value & Pricing
From CA$775
Amazon.ca 1 offers From CA$775
May 19, 2026 CA$775
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
