Sigma 18-50mm f/2.8 DC DN Contemporary vs 50-120mm f/2.8 DC OS Contemporary
Both are Fujifilm X zoom lenses for APS-C. Here is what actually differs.
Pick the 18-50mm f/2.8 DC DN Contemporary if
- You want the lighter lens to carry: 105 g lighter (285 g vs 390 g)
- You want a wider view: 18mm vs 50mm at the wide end
- You want a compact lens: 76.8 mm vs 99.3 mm long
Pick the 50-120mm f/2.8 DC OS Contemporary if
- You need more reach: 120mm vs 50mm at the long end
- You shoot handheld in dim light or video: it has optical image stabilization and the 18-50mm f/2.8 DC DN Contemporary does not
- You care about the shape of out-of-focus highlights: 11 aperture blades vs 7
- You prefer a newer design: released 2026 vs 2021
Spec differences
12 differences| 18-50mm f/2.8 DC DN Contemporary | 50-120mm f/2.8 DC OS Contemporary | |
|---|---|---|
| Focal length |
18-50mm
|
50-120mm
|
| Weight |
285 g
lighter
|
390 g
|
| Length |
76.8 mm
shorter
|
99.3 mm
|
| Diameter |
61.6 mm
slimmer
|
66.8 mm
|
| Min focus distance |
not listed
|
0.23 m
|
| Max magnification |
0.36×
larger
|
0.33×
|
| Aperture blades |
7
|
11
more blades
|
| Optical design |
not listed
|
18 elements / 13 groups
|
| Autofocus motor |
Stepping motor
|
Linear motor
|
| Image stabilization |
No
|
Yes
stabilized
|
| Weather sealing |
not listed
|
Yes
|
| Released |
2021
|
2026
|
6 identical specs hidden: brand, mount, type, format, max aperture, filter thread. Show all
- Brand
- Sigma both
- Mount
- Fujifilm X both
- Type
- Zoom both
- Format
- APS-C both
- Max aperture
- f/2.8 both
- Filter thread
- 55 mm both
More comparisons
Fujifilm XF 16-55mm F2.8 R LM WR Fujinon vs Sigma 18-50mm f/2.8 DC DN Contemporary
wider (16mm) vs 370 g lighter
Fujifilm XF 16-55mm F2.8 R LM WR Fujinon vs Sigma 50-120mm f/2.8 DC OS Contemporary
wider (16mm) vs 265 g lighter
Fujifilm XC 16-50mm F3.5-5.6 OIS Fujinon vs Sigma 18-50mm f/2.8 DC DN Contemporary
90 g lighter vs ⅔ stop faster
Fujifilm XC 16-50mm F3.5-5.6 OIS Fujinon vs Sigma 50-120mm f/2.8 DC OS Contemporary
195 g lighter vs ⅔ stop faster
Tamron 17–70mm F2.8 Di III-A VC RXD vs Sigma 18-50mm f/2.8 DC DN Contemporary
wider (17mm) vs 0.36× magnification
Tamron 17–70mm F2.8 Di III-A VC RXD vs Sigma 50-120mm f/2.8 DC OS Contemporary
wider (17mm) vs more reach (120mm)