Sigma 17-40mm f/1.8 DC vs 10-18mm f/2.8 DC DN Contemporary
Both are Canon RF lenses for APS-C. Here is what actually differs.
Pick the 17-40mm f/1.8 DC if
- You need 1⅓ stops more light for low light or background blur (f/1.8 vs f/2.8)
- You need more reach: 40mm vs 18mm at the long end
- You care about the shape of out-of-focus highlights: 11 aperture blades vs 7
Pick the 10-18mm f/2.8 DC DN Contemporary if
- You want a wider view: 10mm vs 17mm at the wide end
- You want bigger close-ups: 0.25× vs 0.21× maximum magnification
Spec differences
14 differences| 17-40mm f/1.8 DC | 10-18mm f/2.8 DC DN Contemporary | |
|---|---|---|
| Type |
Zoom
|
Wide Zoom
|
| Focal length |
17-40mm
|
10-18mm
|
| Max aperture |
f/1.8
1⅓ stops faster
|
f/2.8
|
| Weight |
not listed
|
270 g
|
| Length |
not listed
|
62 mm
|
| Diameter |
not listed
|
72.2 mm
|
| Filter thread |
not listed
|
67 mm
|
| Min focus distance |
0.28 m
|
not listed
|
| Max magnification |
0.21×
|
0.25×
larger
|
| Aperture blades |
11
more blades
|
7
|
| Optical design |
17 elements / 11 groups
|
13 elements / 10 groups
|
| Autofocus motor |
not listed
|
Stepping motor
|
| Weather sealing |
not listed
|
Yes
|
| Released |
not listed
|
2023
|
4 identical specs hidden: brand, mount, format, image stabilization. Show all
- Brand
- Sigma both
- Mount
- Canon RF both
- Format
- APS-C both
- Image stabilization
- No both
Our notes
Sigma 17-40mm f/1.8 DC
This 17-40mm f/1.8 APS-C fast wide-angle zoom lens from Sigma fits Canon RF mount cameras. It covers wide angles for landscapes, interiors and architecture.
Our notes
Sigma 10-18mm f/2.8 DC DN Contemporary
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