Sigma Contemporary 28-70mm f/2.8 DG DN
Sigma
94 Overall Score
vs
Rokinon 50M-C
Rokinon
61 Overall Score
What Buyers Say
Sigma Contemporary 28-70mm f/2.8 DG DN
No customer feedback yet
Rokinon 50M-C
78 out of 100 high confidence 30 reviews
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
Value for money 8
Image quality 12
Build quality 6
Autofocus performance 7
Astrophotography suitability 5
Low light performance 4
Scores
Macro
Professional
Portrait
Budget
Street
Video Cinema
Landscape
Travel
Wildlife Sports
Specifications
| Sigma Contemporary 28-70mm f/2.8 DG DN | Rokinon 50M-C | |
|---|---|---|
| Optics | ||
| Type | zoom | prime |
| Focal Length Min | 28 mm | 50 mm |
| Focal Length Max | 70 mm | 50 mm |
| Elements | 16 | 9 |
| Groups | 12 | 6 |
| Aspherical Elements | 3★ | 2 |
| ED Elements | 4★ | 1 |
| Coating | Super Multi-Layer Coating and Nano Porous Coating | Ultra Multi-Coating |
| Aperture | ||
| Max Aperture | f/2.8 | f/1.4 |
| Min Aperture | f/2.8 | f/1.4 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 9★ | 8 |
| Build | ||
| Mount | Sony E | Sony E |
| Format | full-frame | full-frame |
| Weather Sealed | ✓ | ✓ |
| Weight | 0.47 kg★ | 0.54 kg |
| Filter Thread | 67 mm | 77 mm |
| AF & Stabilization | ||
| AF Type | stepping motor★ | manual focus only |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 190 mm★ | 450 mm |
| Max Magnification | 3.3 to 4.6 x★ | 1:6.25 |
Pros & Cons
Sigma Contemporary 28-70mm f/2.8 DG DN
- Strong macro (95th percentile)95th %ile
- Strong optical (95th percentile)95th %ile
- Strong bokeh (91st percentile)91st %ile
- Strong aperture (88th percentile)88th %ile
- Below average stabilization (34th percentile)
Rokinon 50M-C
- Strong aperture (98th percentile)98th %ile
- Strong bokeh (97th percentile)97th %ile
- Strong build (67th percentile)
- Below average af (15th percentile)15th %ile
- Below average user sentiment (32nd percentile)
- Below average versatility (33rd percentile)
- Below average stabilization (34th percentile)
Pricing
Sigma Contemporary 28-70mm f/2.8 DG DN0.122score per dollar
vs
Rokinon 50M-C0.345score per dollar
Rokinon 50M-C offers 2.8x better value for money
Verdict
Winner: Sigma Contemporary 28-70mm f/2.8 DG DN
Scores 94 overall, wins 9 of 9 usage categories and 7 of 21 specs.
