Sigma Contemporary 18-50mm f/2.8 DC DN
Sigma
98 Overall Score
vs
Sirui Astra Series AST-50-LB 50mm
Sirui
32 Overall Score
Scores
Travel
Street
Budget
Professional
Macro
Video Cinema
Portrait
Landscape
Wildlife Sports
Specifications
| Sigma Contemporary 18-50mm f/2.8 DC DN | Sirui Astra Series AST-50-LB 50mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 18 mm | 50 mm |
| Focal Length Max | 50 mm | 50 mm |
| Elements | 13 | 18 |
| Groups | 10 | 13 |
| Aspherical Elements | 3★ | — |
| ED Elements | 1★ | — |
| Coating | Super Multi-Layer Coating | — |
| Aperture | ||
| Max Aperture | f/2.8 | f/22 |
| Min Aperture | f/2.8 | f/1.9 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 7 | 11★ |
| Build | ||
| Mount | Sony E | Nikon Z |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓★ | — |
| Weight | 0.29 kg★ | 0.62 kg |
| Filter Thread | 55 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | stepping motor★ | Selectable Manual and Autofocus |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 121 mm★ | 500 mm |
| Max Magnification | 1:2.8 | 1:7.2 |
Pros & Cons
Sigma Contemporary 18-50mm f/2.8 DC DN
- Strong macro (92nd percentile)92nd %ile
- Strong social proof (90th percentile)90th %ile
- Strong af (87th percentile)87th %ile
- Strong build (86th percentile)86th %ile
Sirui Astra Series AST-50-LB 50mm
- Strong optical (73rd percentile)
- Below average af (13th percentile)13th %ile
- Below average aperture (20th percentile)20th %ile
- Below average bokeh (33rd percentile)
- Below average versatility (34th percentile)
Pricing
Sigma Contemporary 18-50mm f/2.8 DC DN0.131score per dollar
vs
Sirui Astra Series AST-50-LB 50mm0.028score per dollar
Sigma Contemporary 18-50mm f/2.8 DC DN offers 4.7x better value for money
Verdict
Winner: Sigma Contemporary 18-50mm f/2.8 DC DN
Scores 98 overall, wins 9 of 9 usage categories and 6 of 21 specs.
