Canon RF10-20mm F4 L IS STMvsCanon RF15-35mm F2.8 L IS USM
RF10-20mm F4 L IS STM
10-20mm / F4
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RF15-35mm F2.8 L IS USM
15-35mm / F2.8
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Which to choose
When the RF10-20mm F4 L IS STM suits you better
- Weight270g lighter, so easier to carry
- Close focusFocuses as close as 25cm
When the RF15-35mm F2.8 L IS USM suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Zoom rangeCovers 15-35mm in a single lens
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
- RF10-20mm F4 L IS STM112mm long × 83.7mm diameter
- RF15-35mm F2.8 L IS USM126.8mm long × 88.5mm diameter
Specifications compared
| Specification | Canon RF10-20mm F4 L IS STM | Canon RF15-35mm F2.8 L IS USM | Difference |
|---|---|---|---|
| Focal length (wide) | 10mm | 15mm | −5mm |
| Focal length (tele) | 20mm | 35mm | −15mm |
| Max aperture (wide) | F4 | F2.8 | 1.0 stops darker |
| Max aperture (tele) | F4 | F2.8 | 1.0 stops darker |
| Min aperture | F22 | F22 | — |
| Min focus distance | 25cm | 28cm | −0.03m |
| Max magnification | 0.12× | 0.21× | −0.09x |
| Aperture blades | 9blades | 9blades | — |
| Weight | 570g | 840g | −270g |
| Length | 112mm | 126.8mm | −14.8mm |
| Diameter | 83.7mm | 88.5mm | −4.8mm |
| Filter size | — | 82mm | No data |
| Released | 2023 | 2019 | +4year |
| Stabilization | Yes | Yes | — |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF10-20mm F4 L IS STM relative to RF15-35mm F2.8 L IS USM.The highlighted cell is the better side for that specification.
Check prices
RF10-20mm F4 L IS STM
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RF15-35mm F2.8 L IS USM
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.
RF10-20mm F4 L IS STM in detailRF15-35mm F2.8 L IS USM in detailAll RF mount lenses