Sigma 20mm f/1.4 DG HSM Art vs Samyang 20mm T1.9 ED AS UMC
Both are Pentax K prime lenses for full frame. Here is what actually differs.
Pick the Sigma 20mm f/1.4 DG HSM Art if
- You need 1 stop more light for low light or background blur (f/1.4 vs f/1.9)
- You want autofocus (HSM): the Samyang 20mm T1.9 ED AS UMC is manual focus only
Pick the Samyang 20mm T1.9 ED AS UMC if
- You shoot close-ups: it focuses down to 0.2 m vs 0.28 m
- You want a compact lens: 86.9 mm vs 129.8 mm long
Spec differences
11 differences| Sigma 20mm f/1.4 DG HSM Art | Samyang 20mm T1.9 ED AS UMC | |
|---|---|---|
| Brand |
Sigma
|
Samyang
|
| Max aperture |
f/1.4
1 stop faster
|
f/1.9
|
| Weight |
950 g
|
not listed
|
| Length |
129.8 mm
|
86.9 mm
shorter
|
| Diameter |
90.7 mm
|
83 mm
slimmer
|
| Filter thread |
not listed
|
77 mm
|
| Min focus distance |
0.28 m
|
0.2 m
closer
|
| Max magnification |
0.14×
|
not listed
|
| Aperture blades |
9
|
not listed
|
| Optical design |
15 elements / 11 groups
|
13 elements / 12 groups
|
| Autofocus motor |
HSM
|
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
Sigma 20mm f/1.4 DG HSM Art
A 20mm f/1.4 full-frame fast wide-angle prime lens, the Sigma 20mm f/1.4 DG HSM Art is designed for Pentax K mount bodies, from the Sigma Art line with Hyper Sonic Motor autofocus. A wide-aperture wide-angle prime from Sigma's Art line, popular for astrophotography and landsca...
Our notes
Samyang 20mm T1.9 ED AS UMC
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