Sigma Contemporary 18-50mm f/2.8 DC DN
Rokinon AF 50mm f/1.4 50mm
What Buyers Say
Sigma Contemporary 18-50mm f/2.8 DC DN
The Sigma 18-50mm f/2.8 DC DN Contemporary is widely praised as a compact, lightweight, and sharp standard zoom for APS-C mirrorless cameras. Users consistently highlight its excellent image quality, fast f/2.8 aperture, and affordable price as major strengths, making it a popular upgrade from kit lenses. Common criticisms include the lack of optical stabilization and a poorly designed lens hood, but overall sentiment is overwhelmingly positive.
Pros
- Excellent image sharpness
- Compact and lightweight design
- Fast f/2.8 constant aperture
- Great value for the price
- Fast and silent autofocus
Cons
- No optical image stabilization
- Poorly designed lens hood
- No weather sealing
- Plastic build quality
- Zoom ring direction opposite to Fujifilm
Rokinon AF 50mm f/1.4 50mm
The Rokinon 50mm f/1.4 lens receives generally positive feedback for its excellent value, sharp optics, and solid build quality, especially for astrophotography and low-light use. However, many users note that the autofocus can be inconsistent and unreliable for fast-moving subjects, and some copies have decentering issues. The lens is fully manual on certain mounts, which is a key consideration for buyers.
Pros
- Excellent value for money
- Sharp optics for the price
- Solid all-metal build quality
- Great for astrophotography
- Good low-light performance at f/1.4
Cons
- Inconsistent autofocus performance
- Autofocus unreliable for fast-moving subjects
- Some copies have decentering issues
- Soft corners at f/1.4
- Fully manual on certain mounts
Scores
Specifications
| Sigma Contemporary 18-50mm f/2.8 DC DN | Rokinon AF 50mm f/1.4 50mm | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 18 mm | 50 mm |
| Focal Length Max | 50 mm | 50 mm |
| Elements | 13 | 9 |
| Groups | 10 | 6 |
| Aspherical Elements | 3★ | 2 |
| ED Elements | 1 | 1 |
| Coating | Super Multi-Layer Coating | Ultra Multi-Coating |
| Aperture | ||
| Max Aperture | f/2.8 | f/1.4 |
| Min Aperture | f/2.8 | f/1.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 7 | 8★ |
| Build | ||
| Mount | Sony E | Sony E |
| Format | APS-C | full-frame★ |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.29 kg★ | 0.42 kg |
| Filter Thread | 55 mm | 77 mm |
| AF & Stabilization | ||
| AF Type | stepping motor★ | manual focus only |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 121 mm★ | 450 mm |
| Max Magnification | 1:2.8 | 1:6.25 |
Pros & Cons
Sigma Contemporary 18-50mm f/2.8 DC DN
- Strong social proof (91st percentile)91st %ile
- Strong macro (90th percentile)90th %ile
- Strong aperture (86th percentile)86th %ile
- Strong af (85th percentile)85th %ile
- Below average stabilization (35th percentile)
Rokinon AF 50mm f/1.4 50mm
- Strong build (76th percentile)
- Below average af (14th percentile)14th %ile
- Below average bokeh (19th percentile)19th %ile
- Below average aperture (22nd percentile)
- Below average user sentiment (30th percentile)
Pricing
Sigma Contemporary 18-50mm f/2.8 DC DN offers 1.3x better value for money
Verdict
Scores 94 overall, wins 9 of 9 usage categories and 4 of 21 specs.
