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
ADLinks to Amazon, B&H Photo, Adorama, KEH Camera, MPB, eBay are affiliate links. We may earn a commission if you buy through them, at no extra cost to you.Links marked “Search results” go to that retailer’s search page for this lens name.Check price and availability on the retailer’s own site.
E 20mm F2.8 in detail17-50mm F/4 Di III VXD in detailAll E-mount lenses