Tamron 18-300mm F/3.5-6.3 Di III-A VC VXDvsTamron 50-400mm F/4.5-6.3 Di III VC VXD
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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50-400mm F/4.5-6.3 Di III VC VXD
50-400mm / F4.5-6.3
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Which to choose
When the 18-300mm F/3.5-6.3 Di III-A VC VXD suits you better
- Brightness0.7 stops brighter — better in low light and blurs the background more
- Weight545g lighter, so easier to carry
- Close focusFocuses as close as 15cm
- Zoom rangeCovers 18-300mm in a single lens
When the 50-400mm F/4.5-6.3 Di III VC VXD suits you better
No standout advantage in this comparison.
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
- 18-300mm F/3.5-6.3 Di III-A VC VXD127.6mm long × 75.5mm diameter
- 50-400mm F/4.5-6.3 Di III VC VXD185.8mm long × 88.5mm diameter
Specifications compared
| Specification | Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD | Tamron 50-400mm F/4.5-6.3 Di III VC VXD | Difference |
|---|---|---|---|
| Focal length (wide) | 18mm | 50mm | −32mm |
| Focal length (tele) | 300mm | 400mm | −100mm |
| Max aperture (wide) | F3.5 | F4.5 | 0.7 stops brighter |
| Max aperture (tele) | F6.3 | F6.3 | — |
| Min focus distance | 15cm | 25cm | −0.10m |
| Weight | 635g | 1.18kg | −545g |
| Length | 127.6mm | 185.8mm | −58.2mm |
| Diameter | 75.5mm | 88.5mm | −13mm |
| Filter size | 67mm | 67mm | — |
| Released | 2025 | 2024 | +1year |
| Stabilization | Yes | Yes | — |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as 18-300mm F/3.5-6.3 Di III-A VC VXD relative to 50-400mm F/4.5-6.3 Di III VC VXD.The highlighted cell is the better side for that specification.
Check prices
18-300mm F/3.5-6.3 Di III-A VC VXD
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50-400mm F/4.5-6.3 Di III VC 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.
18-300mm F/3.5-6.3 Di III-A VC VXD in detail50-400mm F/4.5-6.3 Di III VC VXD in detailAll Z mount lenses