Pentax smc Pentax-FA 20mm f/2.8 vs Samyang 20mm T1.9 ED AS UMC
Both are Pentax K prime lenses for full frame. Here is what actually differs.
Pick the Pentax smc Pentax-FA 20mm f/2.8 if
Our spec data shows no clear advantage for this lens.
Pick the Samyang 20mm T1.9 ED AS UMC if
- You need 1 stop more light for low light or background blur (f/1.9 vs f/2.8)
- You shoot close-ups: it focuses down to 0.2 m vs 0.25 m
Spec differences
8 differences| Pentax smc Pentax-FA 20mm f/2.8 | Samyang 20mm T1.9 ED AS UMC | |
|---|---|---|
| Brand |
Pentax
|
Samyang
|
| Max aperture |
f/2.8
|
f/1.9
1 stop faster
|
| Length |
not listed
|
86.9 mm
|
| Diameter |
not listed
|
83 mm
|
| Filter thread |
67 mm
|
77 mm
|
| Min focus distance |
0.25 m
|
0.2 m
closer
|
| Optical design |
10 elements / 9 groups
|
13 elements / 12 groups
|
| Autofocus motor |
not listed
|
Manual focus
|
5 identical specs hidden: mount, type, format, focal length, image stabilization. Show all
- Mount
- Pentax K both
- Type
- Prime both
- Format
- Full frame both
- Focal length
- 20mm both
- Image stabilization
- No both
Our notes
Pentax smc Pentax-FA 20mm f/2.8
Pentax smc Pentax-FA 20mm f/2.8: a wide-angle prime lens with a 20mm focal length and a maximum aperture of f/2.8, made for Pentax K mount cameras. The wide view suits landscapes, architecture and environmental shots.
Our notes
Samyang 20mm T1.9 ED AS UMC
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1 stop faster vs focuses closer
Samyang 20mm f/1.8 ED AS UMC vs Pentax smc Pentax-FA 20mm f/2.8
Samyang 20mm f/1.8 ED AS UMC: 1⅓ stops faster, focuses closer
Pentax smc Pentax-A 20mm f/2.8 vs Samyang 20mm T1.9 ED AS UMC
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Pentax smc Pentax-FA 20mm f/2.8 vs Sigma 20mm f/1.8 EX DG ASPHERICAL RF
Sigma 20mm f/1.8 EX DG ASPHERICAL RF: 1⅓ stops faster, focuses closer