Canon RF24-105mm F4 L IS USMvsSigma 17-40mm F1.8 DC
RF24-105mm F4 L IS USM
24-105mm / F4
—
17-40mm F1.8 DC
17-40mm / F1.8
26-60mm equiv.
—
Which to choose
When the RF24-105mm F4 L IS USM suits you better
- Zoom rangeCovers 24-105mm in a single lens
- StabilizationHas stabilization
When the 17-40mm F1.8 DC suits you better
- Brightness2.3 stops brighter — better in low light and blurs the background more
- Weight140g lighter, so easier to carry
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
- RF24-105mm F4 L IS USM107.3mm long × 83.5mm diameter
- 17-40mm F1.8 DC115.9mm long × 72.9mm diameter
Specifications compared
| Specification | Canon RF24-105mm F4 L IS USM | Sigma 17-40mm F1.8 DC | Difference |
|---|---|---|---|
| Focal length (wide) | 24mm | 17mm | +7mm |
| Focal length (tele) | 105mm | 40mm | +65mm |
| Max aperture (wide) | F4 | F1.8 | 2.3 stops darker |
| Max aperture (tele) | F4 | F1.8 | 2.3 stops darker |
| Min aperture | F22 | — | No data |
| Min focus distance | 45cm | — | No data |
| Max magnification | 0.24× | — | No data |
| Aperture blades | 9blades | — | No data |
| Weight | 700g | 560g | +140g |
| Length | 107.3mm | 115.9mm | −8.6mm |
| Diameter | 83.5mm | 72.9mm | +10.6mm |
| Filter size | 77mm | 67mm | +10mm |
| Released | 2018 | 2025 | −7year |
| Stabilization | Yes | No | Yes |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF24-105mm F4 L IS USM relative to 17-40mm F1.8 DC.The highlighted cell is the better side for that specification.
Check prices
RF24-105mm F4 L IS USM
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.
17-40mm F1.8 DC
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.
RF24-105mm F4 L IS USM in detail17-40mm F1.8 DC in detailAll RF mount lenses