Canon RF20-50mm F4 L IS USM PZvsTamron 11-20mm F/2.8 Di III-A RXD
RF20-50mm F4 L IS USM PZ
20-50mm / F4
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11-20mm F/2.8 Di III-A RXD
11-20mm / F2.8
17-30mm equiv.
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Which to choose
When the RF20-50mm F4 L IS USM PZ suits you better
- Zoom rangeCovers 20-50mm in a single lens
- StabilizationHas stabilization
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
- Weight80g lighter, so easier to carry
- Close focusFocuses as close as 15cm
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
- RF20-50mm F4 L IS USM PZ98.4mm long × 79.9mm diameter
- 11-20mm F/2.8 Di III-A RXD84.2mm long × 73mm diameter
Specifications compared
| Specification | Canon RF20-50mm F4 L IS USM PZ | Tamron 11-20mm F/2.8 Di III-A RXD | Difference |
|---|---|---|---|
| Focal length (wide) | 20mm | 11mm | +9mm |
| Focal length (tele) | 50mm | 20mm | +30mm |
| Max aperture (wide) | F4 | F2.8 | 1.0 stops darker |
| Max aperture (tele) | F4 | F2.8 | 1.0 stops darker |
| Min aperture | F22 | — | No data |
| Min focus distance | 24cm | 15cm | +0.09m |
| Max magnification | 0.33× | — | No data |
| Aperture blades | 9blades | — | No data |
| Weight | 420g | 340g | +80g |
| Length | 98.4mm | 84.2mm | +14.2mm |
| Diameter | 79.9mm | 73mm | +6.9mm |
| Filter size | 67mm | 67mm | — |
| Released | 2026 | 2024 | +2year |
| Stabilization | Yes | No | Yes |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF20-50mm F4 L IS USM PZ relative to 11-20mm F/2.8 Di III-A RXD.The highlighted cell is the better side for that specification.
Check prices
RF20-50mm F4 L IS USM PZ
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11-20mm F/2.8 Di III-A RXD
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RF20-50mm F4 L IS USM PZ in detail11-20mm F/2.8 Di III-A RXD in detailAll RF mount lenses