Samyang 20mm F1.8 ED AS UMC vs Sigma 20mm F2 DG | Contemporary
Key differences
- —The 20mm F2 DG | Contemporary is 155g lighter (370g vs 525g).
- —The 20mm F1.8 ED AS UMC is faster: f/1.8 vs f/2 (≈0.3 stops more light).
- —At launch the 20mm F1.8 ED AS UMC cost $100 less ($599 vs $699).
- —The 20mm F1.8 ED AS UMC is manual focus only.
- —For close-ups the 20mm F1.8 ED AS UMC reaches 0.15× vs 0.15×.
- Mount
- Sony E (FE)
- Sony E (FE)
- Focal length
- 20mm
- 20mm
- Max aperture
- F1.8◆
- F2
- Weight
- 525g
- 370g◆
- Dimensions ⌀ × L
- 83.0 × 114.4mm
- 70.0 × 74.4mm
- Volume
- 619 cm³
- 286 cm³◆
- Density
- 0.85 g/cm³
- 1.29 g/cm³
- Filter thread
- ⌀77mm
- ⌀62mm
- Min focus
- 0.20m◆
- 0.22m
- Max magnification
- 0.15×◆
- 0.15×
- Elements / groups
- 13 / 12
- 13 / 11
- Aperture blades
- 7
- 9◆
- Focus drive
- Manual Helicoid
- Stepping Motor
- Stabilisation
- —
- —
- Weather sealed
- —
- —
- Aperture ring
- Yes
- Yes
- Released
- 2016
- 2022
- MSRP (USD)
- $599◆
- $699
- Sharpness
- 7.6
- 8.2◆
- Bokeh Rendering
- 7.4◆
- 7.1
- Autofocus Speed
- MF
- 8.0
- Flare Resistance
- 7.0
- 8.3◆
- Build / Sealing
- 7.2
- 8.7◆
- Value / Size
- 8.2
- 8.3◆
Performance overlay
- 20mm F1.8 ED AS UMC
- 20mm F2 DG | Contemporary
◆ marks the best value in a row. Scores are 0–10 editorial ratings.