Tamron 11-20mm F/2.8 Di III-A RXDvsTamron 17-50mm F/4 Di III VXD
11-20mm F/2.8 Di III-A RXD
11-20mm / F2.8
17-30mm equiv.
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17-50mm F/4 Di III VXD
17-50mm / F4
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Which to choose
When the 11-20mm F/2.8 Di III-A RXD suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Weight125g lighter, so easier to carry
- Close focusFocuses as close as 15cm
When the 17-50mm F/4 Di III VXD suits you better
- Zoom rangeCovers 17-50mm in a single lens
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
- 11-20mm F/2.8 Di III-A RXD86.2mm long × 73mm diameter
- 17-50mm F/4 Di III VXD114.4mm long × 74.8mm diameter
Specifications compared
| Specification | Tamron 11-20mm F/2.8 Di III-A RXD | Tamron 17-50mm F/4 Di III VXD | Difference |
|---|---|---|---|
| Focal length (wide) | 11mm | 17mm | −6mm |
| Focal length (tele) | 20mm | 50mm | −30mm |
| Max aperture (wide) | F2.8 | F4 | 1.0 stops brighter |
| Max aperture (tele) | F2.8 | F4 | 1.0 stops brighter |
| Min aperture | F16 | F22 | −6.0 |
| Min focus distance | 15cm | 19cm | −0.04m |
| Max magnification | 0.25× | 0.25× | — |
| Aperture blades | 7blades | 9blades | −2blades |
| Weight | 335g | 460g | −125g |
| Length | 86.2mm | 114.4mm | −28.2mm |
| Diameter | 73mm | 74.8mm | −1.8mm |
| Filter size | 67mm | 67mm | — |
| Released | 2021 | 2024 | −3year |
| Stabilization | No | No | — |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as 11-20mm F/2.8 Di III-A RXD relative to 17-50mm F/4 Di III VXD.The highlighted cell is the better side for that specification.
Check prices
11-20mm F/2.8 Di III-A RXD
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17-50mm F/4 Di III VXD
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11-20mm F/2.8 Di III-A RXD in detail17-50mm F/4 Di III VXD in detailAll E-mount lenses