Samyang 20mm F1.8 ED AS UMC vs Tamron 20mm F/2.8 Di III OSD M1:2
Key differences
- —The 20mm F/2.8 Di III OSD M1:2 is 305g lighter (220g vs 525g).
- —The 20mm F1.8 ED AS UMC is faster: f/1.8 vs f/2.8 (≈1.3 stops more light).
- —At launch the 20mm F/2.8 Di III OSD M1:2 cost $250 less ($349 vs $599).
- —The 20mm F1.8 ED AS UMC is manual focus only.
- —For close-ups the 20mm F/2.8 Di III OSD M1:2 reaches 0.50× vs 0.15×.
- Mount
- Sony E (FE)
- Sony E (FE)
- Focal length
- 20mm
- 20mm
- Max aperture
- F1.8◆
- F2.8
- Weight
- 525g
- 220g◆
- Dimensions ⌀ × L
- 83.0 × 114.4mm
- 73.0 × 64.0mm
- Volume
- 619 cm³
- 268 cm³◆
- Density
- 0.85 g/cm³
- 0.82 g/cm³
- Filter thread
- ⌀77mm
- ⌀67mm
- Min focus
- 0.20m
- 0.11m◆
- Max magnification
- 0.15×
- 0.50×◆
- Elements / groups
- 13 / 12
- 10 / 9
- Aperture blades
- 7
- 7
- Focus drive
- Manual Helicoid
- OSD Motor
- Stabilisation
- —
- —
- Weather sealed
- —
- Yes
- Aperture ring
- Yes
- —
- Released
- 2016
- 2020
- MSRP (USD)
- $599
- $349◆
- Sharpness
- 7.6
- 8.0◆
- Bokeh Rendering
- 7.4◆
- 6.8
- Autofocus Speed
- MF
- 7.2
- Flare Resistance
- 7.0
- 7.6◆
- Build / Sealing
- 7.2
- 7.6◆
- Value / Size
- 8.2
- 9.1◆
Performance overlay
- 20mm F1.8 ED AS UMC
- 20mm F/2.8 Di III OSD M1:2
◆ marks the best value in a row. Scores are 0–10 editorial ratings.