Canon RF24-50mm F4.5-6.3 IS STMvsTamron 17-70mm F/2.8 Di III-A VC RXD
RF24-50mm F4.5-6.3 IS STM
24-50mm / F4.5-6.3
—
17-70mm F/2.8 Di III-A VC RXD
17-70mm / F2.8
26-105mm equiv.
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Which to choose
When the RF24-50mm F4.5-6.3 IS STM suits you better
- Weight320g lighter, so easier to carry
When the 17-70mm F/2.8 Di III-A VC RXD suits you better
- Brightness1.4 stops brighter — better in low light and blurs the background more
- Close focusFocuses as close as 19cm
- Zoom rangeCovers 17-70mm 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
- RF24-50mm F4.5-6.3 IS STM58mm long × 69.6mm diameter
- 17-70mm F/2.8 Di III-A VC RXD117.3mm long × 74.6mm diameter
Specifications compared
| Specification | Canon RF24-50mm F4.5-6.3 IS STM | Tamron 17-70mm F/2.8 Di III-A VC RXD | Difference |
|---|---|---|---|
| Focal length (wide) | 24mm | 17mm | +7mm |
| Focal length (tele) | 50mm | 70mm | −20mm |
| Max aperture (wide) | F4.5 | F2.8 | 1.4 stops darker |
| Max aperture (tele) | F6.3 | F2.8 | 2.3 stops darker |
| Min aperture | F22 | — | No data |
| Min focus distance | 30cm | 19cm | +0.11m |
| Max magnification | 0.19× | — | No data |
| Aperture blades | 7blades | — | No data |
| Weight | 210g | 530g | −320g |
| Length | 58mm | 117.3mm | −59.3mm |
| Diameter | 69.6mm | 74.6mm | −5mm |
| Filter size | 58mm | 67mm | −9mm |
| Released | 2023 | 2026 | −3year |
| Stabilization | Yes | Yes | — |
| Weather sealing | No | Yes | No |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF24-50mm F4.5-6.3 IS STM relative to 17-70mm F/2.8 Di III-A VC RXD.The highlighted cell is the better side for that specification.
Check prices
RF24-50mm F4.5-6.3 IS STM
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17-70mm F/2.8 Di III-A VC RXD
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.
RF24-50mm F4.5-6.3 IS STM in detail17-70mm F/2.8 Di III-A VC RXD in detailAll RF mount lenses