Sony FE 28-70mm F2 GM vs Tamron 28-75mm F/2.8 Di III RXD
Key differences
- —The 28-75mm F/2.8 Di III RXD is 368g lighter (550g vs 918g).
- —The FE 28-70mm F2 GM is faster: f/2 vs f/2.8 (≈1.0 stops more light).
- —At launch the 28-75mm F/2.8 Di III RXD cost $2,101 less ($799 vs $2,900).
- —For close-ups the 28-75mm F/2.8 Di III RXD reaches 0.34× vs 0.23×.
- Mount
- Sony E (FE)
- Sony E (FE)
- Focal length
- 28–70mm
- 28–75mm
- Max aperture
- F2◆
- F2.8
- Weight
- 918g
- 550g◆
- Dimensions ⌀ × L
- 92.9 × 139.8mm
- 73.0 × 117.8mm
- Volume
- 948 cm³
- 493 cm³◆
- Density
- 0.97 g/cm³
- 1.12 g/cm³
- Filter thread
- ⌀86mm
- ⌀67mm
- Min focus
- 0.38m
- 0.19m◆
- Max magnification
- 0.23×
- 0.34×◆
- Elements / groups
- 20 / 14
- 15 / 12
- Aperture blades
- 11◆
- 9
- Focus drive
- XD Linear Motor (x4)
- RXD Stepping Motor
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- Yes · de-click
- —
- Released
- 2024
- 2018
- MSRP (USD)
- $2,900
- $799◆
- Sharpness
- 9.3◆
- 8.2
- Bokeh Rendering
- 9.2◆
- 7.7
- Autofocus Speed
- 9.5◆
- 7.8
- Flare Resistance
- 8.8◆
- 7.2
- Build / Sealing
- 9.4◆
- 7.6
- Value / Size
- 7.1
- 8.8◆
Performance overlay
- FE 28-70mm F2 GM
- 28-75mm F/2.8 Di III RXD
◆ marks the best value in a row. Scores are 0–10 editorial ratings.