Canon RF 10-20mm F4 L IS STM vs Sigma 10-18mm f/2.8 DC DN Contemporary
Both are Canon RF wide zoom lenses. Here is what actually differs.
Pick the Canon RF 10-20mm F4 L IS STM if
- You need more reach: 20mm vs 18mm at the long end
- You shoot handheld in dim light or video: it has optical image stabilization and the Sigma 10-18mm f/2.8 DC DN Contemporary does not
- You shoot full frame: the Sigma 10-18mm f/2.8 DC DN Contemporary is made for APS-C
- You care about the shape of out-of-focus highlights: 9 aperture blades vs 7
- Our notes say it suits: Landscapes, architecture and interiors, astro and wide video
Pick the Sigma 10-18mm f/2.8 DC DN Contemporary if
- You need 1 stop more light for low light or background blur (f/2.8 vs f/4)
- You want the lighter lens to carry: 300 g lighter (270 g vs 570 g)
- You want bigger close-ups: 0.25× vs 0.12× maximum magnification
- You want a compact lens: 62 mm vs 112 mm long
Spec differences
15 differences| Canon RF 10-20mm F4 L IS STM | Sigma 10-18mm f/2.8 DC DN Contemporary | |
|---|---|---|
| Brand |
Canon
|
Sigma
|
| Format |
Full frame
|
APS-C
|
| Focal length |
10-20mm
|
10-18mm
|
| Max aperture |
f/4
|
f/2.8
1 stop faster
|
| Weight |
570 g
|
270 g
lighter
|
| Length |
112 mm
|
62 mm
shorter
|
| Diameter |
83.7 mm
|
72.2 mm
slimmer
|
| Filter thread |
not listed
|
67 mm
|
| Min focus distance |
0.25 m
|
not listed
|
| Max magnification |
0.12×
|
0.25×
larger
|
| Aperture blades |
9
more blades
|
7
|
| Optical design |
16 elements / 12 groups
|
13 elements / 10 groups
|
| Autofocus motor |
STM
|
Stepping motor
|
| Image stabilization |
Yes
stabilized
|
No
|
| Weather sealing |
not listed
|
Yes
|
3 identical specs hidden: mount, type, released. Show all
- Mount
- Canon RF both
- Type
- Wide Zoom both
- Released
- 2023 both
Our notes
Canon RF 10-20mm F4 L IS STM
A full-frame ultra-wide zoom for Canon RF mirrorless cameras with image stabilization and a constant f/4 aperture. L-series build.
Pros
- Very wide 10mm start
- Constant f/4
- Image stabilization
- L-series build
Cons
- Bulbous front element limits filter use
- Slower than f/2.8 wide zooms
- Software distortion correction is part of the design
Our notes
Sigma 10-18mm f/2.8 DC DN Contemporary
More comparisons
Canon RF 10-20mm F4 L IS STM vs Tamron 18-300mm F3.5-6.3 B061 RF
wider (10mm) vs ⅓ stop faster
Canon RF 15-35mm F2.8 L IS USM vs Sigma 10-18mm f/2.8 DC DN Contemporary
more reach (35mm) vs 570 g lighter
Canon RF 10-20mm F4 L IS STM vs Laowa 10-18mm f/4.5-5.6 FE Zoom
Canon RF 10-20mm F4 L IS STM: ⅓ stop faster, more reach (20mm)
Canon RF 10-20mm F4 L IS STM vs Laowa 8-16mm f/3.5-5 Zoom CF
more reach (20mm) vs ⅓ stop faster
Laowa 8-15mm f/2.8 FF Zoom Fisheye vs Sigma 10-18mm f/2.8 DC DN Contemporary
wider (8mm) vs more reach (18mm)
Canon RF 10-20mm F4 L IS STM vs Sigma 16-300mm f/3.5-6.7 DC OS Contemporary
55 g lighter vs ⅓ stop faster