Sony E 20mm F2.8vsTamron 17-50mm F/4 Di III VXD
E 20mm F2.8
20mm / F2.8
30mm equiv.
—
17-50mm F/4 Di III VXD
17-50mm / F4
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Which to choose
When the E 20mm F2.8 suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Weight391g lighter, so easier to carry
When the 17-50mm F/4 Di III VXD suits you better
- Zoom rangeCovers 17-50mm 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
- E 20mm F2.820.4mm long × 62.6mm diameter
- 17-50mm F/4 Di III VXD114.4mm long × 74.8mm diameter
Specifications compared
| Specification | Sony E 20mm F2.8 | Tamron 17-50mm F/4 Di III VXD | Difference |
|---|---|---|---|
| Focal length (wide) | 20mm | 17mm | +3mm |
| 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 | 20cm | 19cm | +0.01m |
| Max magnification | 0.12× | 0.25× | −0.13x |
| Aperture blades | 7blades | 9blades | −2blades |
| Weight | 69g | 460g | −391g |
| Length | 20.4mm | 114.4mm | −94mm |
| Diameter | 62.6mm | 74.8mm | −12.2mm |
| Filter size | 49mm | 67mm | −18mm |
| Released | 2013 | 2024 | −11year |
| Stabilization | No | No | — |
| Weather sealing | No | Yes | No |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as E 20mm F2.8 relative to 17-50mm F/4 Di III VXD.The highlighted cell is the better side for that specification.
Check prices
E 20mm F2.8
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17-50mm F/4 Di III VXD
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E 20mm F2.8 in detail17-50mm F/4 Di III VXD in detailAll E-mount lenses