Sigma 100-400mm F5-6.3 DG DN OSvsTamron 18-300mm F/3.5-6.3 Di III-A VC VXD
100-400mm F5-6.3 DG DN OS
100-400mm / F5-6.3
150-600mm equiv.
—
18-300mm F/3.5-6.3 Di III-A VC VXD
18-300mm / F3.5-6.3
27-450mm equiv.
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Which to choose
When the 100-400mm F5-6.3 DG DN OS suits you better
No standout advantage in this comparison.
When the 18-300mm F/3.5-6.3 Di III-A VC VXD suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Weight515g lighter, so easier to carry
- Zoom rangeCovers 18-300mm 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
- 100-400mm F5-6.3 DG DN OS199.5mm long × 86mm diameter
- 18-300mm F/3.5-6.3 Di III-A VC VXD125.8mm long × 75.5mm diameter
Specifications compared
| Specification | Sigma 100-400mm F5-6.3 DG DN OS | Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD | Difference |
|---|---|---|---|
| Focal length (wide) | 100mm | 18mm | +82mm |
| Focal length (tele) | 400mm | 300mm | +100mm |
| Max aperture (wide) | F5 | F3.5 | 1.0 stops darker |
| Max aperture (tele) | F6.3 | F6.3 | — |
| Min focus distance | — | 15cm | No data |
| Weight | 1.14kg | 620g | +515g |
| Length | 199.5mm | 125.8mm | +73.7mm |
| Diameter | 86mm | 75.5mm | +10.5mm |
| Filter size | 67mm | 67mm | — |
| Released | 2023 | 2021 | +2year |
| Stabilization | Yes | Yes | — |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as 100-400mm F5-6.3 DG DN OS relative to 18-300mm F/3.5-6.3 Di III-A VC VXD.The highlighted cell is the better side for that specification.
Check prices
100-400mm F5-6.3 DG DN OS
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18-300mm F/3.5-6.3 Di III-A VC VXD
ADLinks to Amazon, MPB, Wex Photo Video, Park Cameras, eBay are affiliate links. We may earn a commission if you buy through them, at no extra cost to you.Links to London Camera Exchange are not affiliate links.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.
100-400mm F5-6.3 DG DN OS in detail18-300mm F/3.5-6.3 Di III-A VC VXD in detailAll X Mount lenses