EF 20 mm f/2.8 USM vs 20 mm f/1.8 EX DG Aspherical RF
Canon
EF 20 mm f/2.8 USM
Sigma
20 mm f/1.8 EX DG Aspherical RF
Here we are comparing the Canon EF 20 mm f/2.8 USM and the Sigma 20 mm f/1.8 EX DG Aspherical RF. The Canon EF 20 mm f/2.8 USM is a 20mm wide-angle prime lens with a maximum aperture of f/2.8, released in 1992. The Sigma 20 mm f/1.8 EX DG Aspherical RF is a 20mm wide-angle prime lens with a maximum aperture of f/1.8, released in 2000.
There is a 8 years difference between the Canon EF 20 mm f/2.8 USM and the Sigma 20 mm f/1.8 EX DG Aspherical RF — the newer design may benefit from more recent optical engineering and coatings.
Below you will find a detailed side-by-side comparison of their specifications, features, and key differences.
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| Compare | Lightest | Fastest Aperture |
|---|---|---|
| Mount | ||
| Sensor Size | Full Frame | Full Frame |
| Best For | Landscape | Landscape |
Price & Availability | ||
| Shop | ||
Optical Specifications | ||
| Focal Length | 20 mm | 20 mm |
| Aperture | f/2.8 | f/1.8 |
| Aperture Blades | 5 | 9 |
Features | ||
| Autofocus | Yes | Yes |
| Image Stabilization | No | No |
| Weather Sealed | No | No |
Close-up Performance | ||
| Min. Focus Distance | 0.25 m | 0.2 m |
| Max. Magnification | - | - |
Physical Specifications | ||
| Weight | 405 g | 520 g |
| Length | 70.6 mm | 87 mm |
| Diameter | 77.5 mm | 88.5 mm |
| Filter Thread | 72 mm | 82 mm |
Price & Availability | ||
| Release Year | 1992 | 2000 |
| Shop | ||
Shopping links may contain affiliate codes that support this site at no extra cost to you.
Comparing Canon EF 20 mm f/2.8 USM (20 mm, f/2.8) and Sigma 20 mm f/1.8 EX DG Aspherical RF (20 mm, f/1.8).
Canon EF 20 mm f/2.8 USM is the lightest at 405 g, Sigma 20 mm f/1.8 EX DG Aspherical RF weighs 520 g.
Sigma 20 mm f/1.8 EX DG Aspherical RF offers the fastest maximum aperture at f/1.8, allowing for better low-light performance and shallower depth of field.
Sigma 20 mm f/1.8 EX DG Aspherical RF can focus closest at 0.2 m minimum focus distance.
Use the detailed comparison table below to see all specifications side-by-side and find the perfect lens for your photography needs.
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