
Tamron 20mm F2.8 Di III OSD M1:2 vs Viltrox 20mm f/2.8
Both are Sony E prime lenses for full frame. Here is what actually differs.

Pick the Tamron 20mm F2.8 Di III OSD M1:2 if
- You shoot close-ups: it focuses down to 0.11 m vs 0.19 m
- You want bigger close-ups: 0.5× vs 0.17× maximum magnification
- Our notes say it suits: Street, landscape, close-up details
Pick the Viltrox 20mm f/2.8 if
- You want the lighter lens to carry: 63 g lighter (157 g vs 220 g)
- You shoot video: STM autofocus is smooth and quiet (the Tamron 20mm F2.8 Di III OSD M1:2 uses OSD)
Spec differences
11 differences| Tamron 20mm F2.8 Di III OSD M1:2 | Viltrox 20mm f/2.8 | |
|---|---|---|
| Brand |
Tamron
|
Viltrox
|
| Weight |
220 g
|
157 g
lighter
|
| Length |
64 mm
|
59.5 mm
shorter
|
| Diameter |
73 mm
|
65 mm
slimmer
|
| Filter thread |
67 mm
|
52 mm
|
| Min focus distance |
0.11 m
closer
|
0.19 m
|
| Max magnification |
0.5×
larger
|
0.17×
|
| Optical design |
10 elements / 9 groups
|
10 elements / 8 groups
|
| Autofocus motor |
OSD
|
STM
|
| Weather sealing |
Yes
|
not listed
|
| Released |
2020
|
not listed
|
7 identical specs hidden: mount, type, format, focal length, max aperture, aperture blades, image stabilization. Show all
- Mount
- Sony E both
- Type
- Prime both
- Format
- Full frame both
- Focal length
- 20mm both
- Max aperture
- f/2.8 both
- Aperture blades
- 7 both
- Image stabilization
- No both
Our notes
Tamron 20mm F2.8 Di III OSD M1:2
A small wide-angle prime for Sony full-frame with 1:2 close-up capability. It weighs about 220 g and uses an OSD focus motor.
Pros
- Compact at about 220 g
- Close focusing to 1:2
- 67mm filter thread
Cons
- f/2.8 is slow for low light
- No stabilization
Our notes
Viltrox 20mm f/2.8
This 20mm f/2.8 wide-angle prime lens from Viltrox fits Sony E mount cameras. The wide view suits landscapes, architecture and environmental shots.
More comparisons

Tamron 20mm F2.8 Di III OSD M1:2 vs Voigtlander Color-Skopar 20mm f/3.5 SL II
Tamron 20mm F2.8 Di III OSD M1:2: ⅔ stop faster, street

Tamron 20mm F2.8 Di III OSD M1:2 vs Sigma 20mm F2 DG DN | Contemporary 022
150 g lighter vs 1 stop faster

Tamron E 20mm F2.8 F050 vs Viltrox 20mm f/2.8
focuses closer vs 63 g lighter

Sony FE 20mm F1.8 G vs Tamron 20mm F2.8 Di III OSD M1:2
1⅓ stops faster vs 153 g lighter
Viltrox 20mm f/2.8 vs Voigtlander Color-Skopar 20mm f/3.5 SL II
Viltrox 20mm f/2.8: ⅔ stop faster
Sigma 20mm F2 DG DN | Contemporary 022 vs Viltrox 20mm f/2.8
1 stop faster vs 213 g lighter