
Tamron 18-300mm F3.5-6.3 Di III-A VC VXD vs Sigma 18-50mm F2.8 DC DN | Contemporary 021
Both are Sony E zoom lenses for APS-C. Here is what actually differs.

Pick the Tamron 18-300mm F3.5-6.3 Di III-A VC VXD if
- You need more reach: 300mm vs 50mm at the long end
- You shoot handheld in dim light or video: it has optical image stabilization and the Sigma 18-50mm F2.8 DC DN | Contemporary 021 does not
- You want bigger close-ups: 0.5× vs 0.36× maximum magnification
Pick the Sigma 18-50mm F2.8 DC DN | Contemporary 021 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: 330 g lighter (290 g vs 620 g)
- You shoot close-ups: it focuses down to 0.12 m vs 0.15 m
- You want a compact lens: 76.5 mm vs 125.6 mm long
- Our notes say it suits: Everyday APS-C shooting, vlogging and travel, low-light snapshots
Spec differences
13 differences| Tamron 18-300mm F3.5-6.3 Di III-A VC VXD | Sigma 18-50mm F2.8 DC DN | Contemporary 021 | |
|---|---|---|
| Brand |
Tamron
|
Sigma
|
| Focal length |
18-300mm
|
18-50mm
|
| Max aperture |
f/3.5
|
f/2.8
⅔ stop faster
|
| Weight |
620 g
|
290 g
lighter
|
| Length |
125.6 mm
|
76.5 mm
shorter
|
| Diameter |
75.5 mm
|
61.6 mm
slimmer
|
| Filter thread |
67 mm
|
55 mm
|
| Min focus distance |
0.15 m
|
0.12 m
closer
|
| Max magnification |
0.5×
larger
|
0.36×
|
| Optical design |
19 elements / 15 groups
|
13 elements / 10 groups
|
| Autofocus motor |
VXD
|
Stepping motor
|
| Image stabilization |
Yes
stabilized
|
No
|
| Weather sealing |
Yes
|
not listed
|
5 identical specs hidden: mount, type, format, aperture blades, released. Show all
- Mount
- Sony E both
- Type
- Zoom both
- Format
- APS-C both
- Aperture blades
- 7 both
- Released
- 2021 both
Our notes
Tamron 18-300mm F3.5-6.3 Di III-A VC VXD
This 18-300mm f/3.5-6.3 full-frame superzoom lens from Tamron fits Sony E mount cameras, with Vibration Compensation. The wide-to-tele range makes it a one-lens option for travel and everyday shooting.
Our notes
Sigma 18-50mm F2.8 DC DN | Contemporary 021
A compact f/2.8 standard zoom for APS-C E-mount cameras, weighing about 290 g. It takes 55mm filters and offers a close focus distance of 0.121 m.
Pros
- Constant f/2.8
- Very light at 290 g
- Close focus 0.121 m
- Stepping motor autofocus
Cons
- APS-C only
- No stabilization in the lens
- Less range than a kit zoom
More comparisons

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