Tamron 17-50mm F/4 Di III VXD vs Tamron 20-40mm F/2.8 Di III VXD
Key differences
- —The 20-40mm F/2.8 Di III VXD is 95g lighter (365g vs 460g).
- —The 20-40mm F/2.8 Di III VXD is faster: f/2.8 vs f/4 (≈1.0 stops more light).
- —At launch the 20-40mm F/2.8 Di III VXD cost $60 less ($739 vs $799).
- Mount
- Sony E (FE)
- Sony E (FE)
- Focal length
- 17–50mm
- 20–40mm
- Max aperture
- F4
- F2.8◆
- Weight
- 460g
- 365g◆
- Dimensions ⌀ × L
- 74.8 × 114.4mm
- 74.4 × 86.5mm
- Volume
- 503 cm³
- 376 cm³◆
- Density
- 0.92 g/cm³
- 0.97 g/cm³
- Filter thread
- ⌀67mm
- ⌀67mm
- Min focus
- 0.19m
- 0.17m◆
- Max magnification
- 0.26×
- 0.26×
- Elements / groups
- 15 / 13
- 12 / 11
- Aperture blades
- 9
- 9
- Focus drive
- VXD Linear Motor
- VXD Linear Motor
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- —
- —
- Released
- 2023
- 2022
- MSRP (USD)
- $799
- $739◆
- Sharpness
- 8.2
- 8.6◆
- Bokeh Rendering
- 7.0
- 7.5◆
- Autofocus Speed
- 8.6
- 8.6
- Flare Resistance
- 8.0
- 8.1◆
- Build / Sealing
- 8.1
- 8.1
- Value / Size
- 8.7
- 9.0◆
Performance overlay
- 17-50mm F/4 Di III VXD
- 20-40mm F/2.8 Di III VXD
◆ marks the best value in a row. Scores are 0–10 editorial ratings.