Sigma 17-40mm f/1.8 DC vs Tamron 17–70mm F2.8 Di III-A VC RXD
Both are Fujifilm X zoom lenses for APS-C. Here is what actually differs.
Pick the Sigma 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 care about the shape of out-of-focus highlights: 11 aperture blades vs 9
- You prefer a newer design: released 2025 vs 2022
Pick the Tamron 17–70mm F2.8 Di III-A VC RXD if
- You need more reach: 70mm vs 40mm at the long end
- You shoot handheld in dim light or video: it has optical image stabilization and the Sigma 17-40mm f/1.8 DC does not
- You shoot close-ups: it focuses down to 0.19 m vs 0.28 m
Spec differences
12 differences| Sigma 17-40mm f/1.8 DC | Tamron 17–70mm F2.8 Di III-A VC RXD | |
|---|---|---|
| Brand |
Sigma
|
Tamron
|
| Focal length |
17-40mm
|
17-70mm
|
| Max aperture |
f/1.8
1⅓ stops faster
|
f/2.8
|
| Weight |
530 g
|
not listed
|
| Length |
118.2 mm
|
not listed
|
| Diameter |
72.9 mm
|
74.6 mm
|
| Min focus distance |
0.28 m
|
0.19 m
closer
|
| Aperture blades |
11
more blades
|
9
|
| Optical design |
17 elements / 11 groups
|
16 elements / 12 groups
|
| Autofocus motor |
not listed
|
RXD
|
| Image stabilization |
No
|
Yes
stabilized
|
| Released |
2025
|
2022
|
6 identical specs hidden: mount, type, format, filter thread, max magnification, weather sealing. Show all
- Mount
- Fujifilm X both
- Type
- Zoom both
- Format
- APS-C both
- Filter thread
- 67 mm both
- Max magnification
- 0.21× both
- Weather sealing
- Yes 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 Fujifilm X mount cameras. It covers wide angles for landscapes, interiors and architecture.
Our notes
Tamron 17–70mm F2.8 Di III-A VC RXD
This 17-70mm f/2.8 APS-C fast standard zoom lens from Tamron fits Fujifilm X mount cameras, with Vibration Compensation and quiet motor-driven autofocus. The range covers everything from wide scenes to portraits, so it works as a general-purpose lens.
More comparisons
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wider (16mm) vs 1⅓ stops faster
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wider (16mm) vs more reach (70mm)
Fujifilm XC 16-50mm F3.5-5.6 OIS Fujinon vs Sigma 17-40mm f/1.8 DC
335 g lighter vs 2 stops faster
Fujifilm XC 16-50mm F3.5-5.6 OIS Fujinon vs Tamron 17–70mm F2.8 Di III-A VC RXD
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Tamron 17–70mm F2.8 Di III-A VC RXD vs Sigma 16-300mm F3.5-6.7 DC OS | Contemporary 025
⅔ stop faster vs wider (16mm)
Sigma 17-40mm f/1.8 DC vs Tokina atx-m 11-18mm F2.8
1⅓ stops faster vs 210 g lighter