Sigma 20mm F1.4 DG DN | Art vs Tamron 20mm F/2.8 Di III OSD M1:2
Key differences
- —The 20mm F/2.8 Di III OSD M1:2 is 410g lighter (220g vs 630g).
- —The 20mm F1.4 DG DN | Art is faster: f/1.4 vs f/2.8 (≈2.0 stops more light).
- —At launch the 20mm F/2.8 Di III OSD M1:2 cost $550 less ($349 vs $899).
- —For close-ups the 20mm F/2.8 Di III OSD M1:2 reaches 0.50× vs 0.16×.
- Mount
- Sony E (FE)
- Sony E (FE)
- Focal length
- 20mm
- 20mm
- Max aperture
- F1.4◆
- F2.8
- Weight
- 630g
- 220g◆
- Dimensions ⌀ × L
- 87.8 × 113.2mm
- 73.0 × 64.0mm
- Volume
- 685 cm³
- 268 cm³◆
- Density
- 0.92 g/cm³
- 0.82 g/cm³
- Filter thread
- ⌀82mm
- ⌀67mm
- Min focus
- 0.23m
- 0.11m◆
- Max magnification
- 0.16×
- 0.50×◆
- Elements / groups
- 17 / 15
- 10 / 9
- Aperture blades
- 11◆
- 7
- Focus drive
- Stepping Motor
- OSD Motor
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- Yes · de-click
- —
- Released
- 2022
- 2020
- MSRP (USD)
- $899
- $349◆
- Sharpness
- 8.6◆
- 8.0
- Bokeh Rendering
- 8.0◆
- 6.8
- Autofocus Speed
- 8.2◆
- 7.2
- Flare Resistance
- 8.0◆
- 7.6
- Build / Sealing
- 8.8◆
- 7.6
- Value / Size
- 8.9
- 9.1◆
Performance overlay
- 20mm F1.4 DG DN | Art
- 20mm F/2.8 Di III OSD M1:2
◆ marks the best value in a row. Scores are 0–10 editorial ratings.