Sigma Contemporary 18-50mm f/2.8 DC DN
Sigma
100 Overall Score
vs
IRIX Blackstone 15mm f/2.4 Blackstone 15mm
IRIX
46 Overall Score
Scores
Street
Travel
Budget
Professional
Portrait
Macro
Video Cinema
Wildlife Sports
Landscape
Specifications
| Sigma Contemporary 18-50mm f/2.8 DC DN | IRIX Blackstone 15mm f/2.4 Blackstone 15mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 18 mm | 15 mm |
| Focal Length Max | 50 mm | 15 mm |
| Elements | 13 | 15 |
| Groups | 10 | 11 |
| Aspherical Elements | 3★ | 2 |
| ED Elements | 1 | 2★ |
| Coating | Super Multi-Layer Coating | Neutrino coating |
| Aperture | ||
| Max Aperture | f/2.8 | f/22 |
| Min Aperture | f/2.8 | f/2.4 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | 7 | 9★ |
| Build | ||
| Mount | Sony E | Pentax K |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.29 kg★ | 0.69 kg |
| Filter Thread | 55 mm | 95 mm |
| AF & Stabilization | ||
| AF Type | stepping motor★ | manual focus only |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 121 mm★ | 280 mm |
| Max Magnification | 1:2.8 | 1:2 |
Pros & Cons
Sigma Contemporary 18-50mm f/2.8 DC DN
- Strong macro (91st percentile)91st %ile
- Strong social proof (90th percentile)90th %ile
- Strong af (88th percentile)88th %ile
- Strong build (87th percentile)87th %ile
IRIX Blackstone 15mm f/2.4 Blackstone 15mm
- Strong optical (86th percentile)86th %ile
- Strong macro (74th percentile)
- Strong social proof (72nd percentile)
- Below average af (13th percentile)13th %ile
- Below average aperture (20th percentile)20th %ile
- Below average bokeh (23rd percentile)
- Below average versatility (34th percentile)
Pricing
Sigma Contemporary 18-50mm f/2.8 DC DN0.214score per dollar
vs
IRIX Blackstone 15mm f/2.4 Blackstone 15mm0.056score per dollar
Sigma Contemporary 18-50mm f/2.8 DC DN offers 3.8x better value for money
Sigma Contemporary 18-50mm f/2.8 DC DN
IRIX Blackstone 15mm f/2.4 Blackstone 15mm
Verdict
Winner: Sigma Contemporary 18-50mm f/2.8 DC DN
Scores 100 overall, wins 9 of 9 usage categories and 5 of 21 specs.
