Tamron 11-20mm F/2.8 Di III-A RXD vs Sigma 20-200mm F3.5-6.3 DG | Contemporary 025
Both are Sony E lenses. Here is what actually differs.
Pick the Tamron 11-20mm F/2.8 Di III-A RXD if
- You need ⅔ stop more light for low light or background blur (f/2.8 vs f/3.5)
- You want the lighter lens to carry: 205 g lighter (335 g vs 540 g)
- You want a wider view: 11mm vs 20mm at the wide end
- You want a compact lens: 86.2 mm vs 117.5 mm long
- Our notes say it suits: Landscape, vlogging, interiors
Pick the Sigma 20-200mm F3.5-6.3 DG | Contemporary 025 if
- You need more reach: 200mm vs 20mm at the long end
- You want bigger close-ups: 0.5× vs 0.25× maximum magnification
- You shoot full frame: the Tamron 11-20mm F/2.8 Di III-A RXD is made for APS-C
- You care about the shape of out-of-focus highlights: 9 aperture blades vs 7
- You prefer a newer design: released 2025 vs 2021
- Our notes say it suits: Travel, walkaround, video
Spec differences
15 differences| Tamron 11-20mm F/2.8 Di III-A RXD | Sigma 20-200mm F3.5-6.3 DG | Contemporary 025 | |
|---|---|---|
| Brand |
Tamron
|
Sigma
|
| Type |
Wide Zoom
|
Superzoom
|
| Format |
APS-C
|
Full frame
|
| Focal length |
11-20mm
|
20-200mm
|
| Max aperture |
f/2.8
⅔ stop faster
|
f/3.5
|
| Weight |
335 g
lighter
|
540 g
|
| Length |
86.2 mm
shorter
|
117.5 mm
|
| Diameter |
73 mm
slimmer
|
77.2 mm
|
| Filter thread |
67 mm
|
72 mm
|
| Min focus distance |
0.15 m
closer
|
0.17 m
|
| Max magnification |
0.25×
|
0.5×
larger
|
| Aperture blades |
7
|
9
more blades
|
| Optical design |
12 elements / 10 groups
|
18 elements / 14 groups
|
| Autofocus motor |
RXD
|
Linear motor
|
| Released |
2021
|
2025
|
3 identical specs hidden: mount, image stabilization, weather sealing. Show all
- Mount
- Sony E both
- Image stabilization
- No both
- Weather sealing
- Yes both
Our notes
Tamron 11-20mm F/2.8 Di III-A RXD
An APS-C ultra-wide zoom for Sony E with a constant f/2.8 aperture, giving about 16.5-30mm equivalent. It uses a 67mm filter thread.
Pros
- Constant f/2.8
- Compact
- Takes screw-in filters
Cons
- APS-C only
- No stabilization
Our notes
Sigma 20-200mm F3.5-6.3 DG | Contemporary 025
A full-frame superzoom for mirrorless covering 20-200mm. It starts wider than typical travel zooms.
Pros
- Wide 20mm start
- Wide zoom range
- Single lens for travel
Cons
- Slow variable aperture
- Image quality is below pro zooms
More comparisons
Sony FE 12-24mm F2.8 GM vs Tamron 11-20mm F/2.8 Di III-A RXD
more reach (24mm) vs 512 g lighter
Sony E 18-200mm F3.5-6.3 OSS vs Sigma 20-200mm F3.5-6.3 DG | Contemporary 025
wider (18mm) vs focuses closer
Sony FE 16-35mm F2.8 GM vs Tamron 11-20mm F/2.8 Di III-A RXD
more reach (35mm) vs 345 g lighter
Sony E 18-200mm F3.5-6.3 OSS LE vs Sigma 20-200mm F3.5-6.3 DG | Contemporary 025
80 g lighter vs focuses closer
Tamron 11-20mm F/2.8 Di III-A RXD vs Sigma 10-18mm F2.8 DC DN | Contemporary 023
more reach (20mm) vs 80 g lighter
Sigma 20-200mm F3.5-6.3 DG | Contemporary 025 vs Tamron E 18-300mm F3.5-6.3 B061
80 g lighter vs wider (18mm)