Tamron 20mm F2.8 Di III OSD M1:2 vs Samyang 20mm f/1.8 ED AS UMC
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 want the lighter lens to carry: 305 g lighter (220 g vs 525 g)
- You want autofocus (OSD): the Samyang 20mm f/1.8 ED AS UMC is manual focus only
- You shoot close-ups: it focuses down to 0.11 m vs 0.2 m
- You want a compact lens: 64 mm vs 114.4 mm long
- Our notes say it suits: Street, landscape, close-up details
Pick the Samyang 20mm f/1.8 ED AS UMC if
- You need 1⅓ stops more light for low light or background blur (f/1.8 vs f/2.8)
Spec differences
13 differences| Tamron 20mm F2.8 Di III OSD M1:2 | Samyang 20mm f/1.8 ED AS UMC | |
|---|---|---|
| Brand |
Tamron
|
Samyang
|
| Max aperture |
f/2.8
|
f/1.8
1⅓ stops faster
|
| Weight |
220 g
lighter
|
525 g
|
| Length |
64 mm
shorter
|
114.4 mm
|
| Diameter |
73 mm
slimmer
|
83 mm
|
| Filter thread |
67 mm
|
77 mm
|
| Min focus distance |
0.11 m
closer
|
0.2 m
|
| Max magnification |
0.5×
|
not listed
|
| Aperture blades |
7
|
not listed
|
| Optical design |
10 elements / 9 groups
|
13 elements / 12 groups
|
| Autofocus motor |
OSD
|
Manual focus
|
| Weather sealing |
Yes
|
not listed
|
| Released |
2020
|
not listed
|
5 identical specs hidden: mount, type, format, focal length, image stabilization. Show all
- Mount
- Sony E both
- Type
- Prime both
- Format
- Full frame both
- Focal length
- 20mm 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
Samyang 20mm f/1.8 ED AS UMC
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
Sony FE 20mm F1.8 G vs Samyang 20mm f/1.8 ED AS UMC
Sony FE 20mm F1.8 G: 152 g lighter, focuses closer
Tamron 20mm F2.8 Di III OSD M1:2 vs Sigma 20mm F2 DG DN | Contemporary 022
150 g lighter vs 1 stop faster
Sigma 20mm F2 DG DN | Contemporary 022 vs Samyang 20mm f/1.8 ED AS UMC
155 g lighter vs ⅓ stop faster
Sony FE 20mm F1.8 G vs Tamron 20mm F2.8 Di III OSD M1:2
1⅓ stops faster vs 153 g lighter
Tamron 20mm F2.8 Di III OSD M1:2 vs Viltrox 20mm f/2.8
focuses closer vs 63 g lighter