Canon RF24-240mm F4-6.3 IS USMvsTamron 17-70mm F/2.8 Di III-A VC RXD
RF24-240mm F4-6.3 IS USM
24-240mm / F4-6.3
—
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 RF24-240mm F4-6.3 IS USM suits you better
- Zoom rangeCovers 24-240mm in a single lens
When the 17-70mm F/2.8 Di III-A VC RXD suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Weight220g lighter, so easier to carry
- Close focusFocuses as close as 19cm
- 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
- RF24-240mm F4-6.3 IS USM122.5mm long × 80.4mm diameter
- 17-70mm F/2.8 Di III-A VC RXD117.3mm long × 74.6mm diameter
Specifications compared
| Specification | Canon RF24-240mm F4-6.3 IS USM | Tamron 17-70mm F/2.8 Di III-A VC RXD | Difference |
|---|---|---|---|
| Focal length (wide) | 24mm | 17mm | +7mm |
| Focal length (tele) | 240mm | 70mm | +170mm |
| Max aperture (wide) | F4 | F2.8 | 1.0 stops darker |
| Max aperture (tele) | F6.3 | F2.8 | 2.3 stops darker |
| Min aperture | F22 | — | No data |
| Min focus distance | 50cm | 19cm | +0.31m |
| Max magnification | 0.26× | — | No data |
| Aperture blades | 7blades | — | No data |
| Weight | 750g | 530g | +220g |
| Length | 122.5mm | 117.3mm | +5.2mm |
| Diameter | 80.4mm | 74.6mm | +5.8mm |
| Filter size | 72mm | 67mm | +5mm |
| Released | 2019 | 2026 | −7year |
| Stabilization | Yes | Yes | — |
| Weather sealing | No | Yes | No |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF24-240mm F4-6.3 IS USM relative to 17-70mm F/2.8 Di III-A VC RXD.The highlighted cell is the better side for that specification.
Check prices
RF24-240mm F4-6.3 IS USM
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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.
RF24-240mm F4-6.3 IS USM in detail17-70mm F/2.8 Di III-A VC RXD in detailAll RF mount lenses