Canon RF28-70mm F2.8 IS STMvsTamron 17-70mm F/2.8 Di III-A VC RXD
RF28-70mm F2.8 IS STM
28-70mm / F2.8
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17-70mm F/2.8 Di III-A VC RXD
17-70mm / F2.8
26-105mm equiv.
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Which to choose
When the RF28-70mm F2.8 IS STM suits you better
No standout advantage in this comparison.
When the 17-70mm F/2.8 Di III-A VC RXD suits you better
- Zoom rangeCovers 17-70mm in a single lens
- Weather sealingHas weather sealing
These points are derived mechanically from the numbers. How a lens actually renders does not show up in specifications, so look at samples before deciding.
Size compared
- RF28-70mm F2.8 IS STM92.2mm long × 76.5mm diameter
- 17-70mm F/2.8 Di III-A VC RXD117.3mm long × 74.6mm diameter
Specifications compared
| Specification | Canon RF28-70mm F2.8 IS STM | Tamron 17-70mm F/2.8 Di III-A VC RXD | Difference |
|---|---|---|---|
| Focal length (wide) | 28mm | 17mm | +11mm |
| Focal length (tele) | 70mm | 70mm | — |
| Max aperture (wide) | F2.8 | F2.8 | — |
| Max aperture (tele) | F2.8 | F2.8 | — |
| Min aperture | F22 | — | No data |
| Min focus distance | — | 19cm | No data |
| Aperture blades | 9blades | — | No data |
| Weight | 495g | 530g | −35g |
| Length | 92.2mm | 117.3mm | −25.1mm |
| Diameter | 76.5mm | 74.6mm | +1.9mm |
| Filter size | 67mm | 67mm | — |
| Released | 2024 | 2026 | −2year |
| Stabilization | Yes | Yes | — |
| Weather sealing | No | Yes | No |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF28-70mm F2.8 IS STM relative to 17-70mm F/2.8 Di III-A VC RXD.The highlighted cell is the better side for that specification.
Check prices
RF28-70mm F2.8 IS STM
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17-70mm F/2.8 Di III-A VC RXD
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RF28-70mm F2.8 IS STM in detail17-70mm F/2.8 Di III-A VC RXD in detailAll RF mount lenses