Canon RF10-20mm F4 L IS STMvsCanon RF16-28mm F2.8 IS STM
RF10-20mm F4 L IS STM
10-20mm / F4
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RF16-28mm F2.8 IS STM
16-28mm / F2.8
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Which to choose
When the RF10-20mm F4 L IS STM suits you better
- Zoom rangeCovers 10-20mm in a single lens
- Weather sealingHas weather sealing
When the RF16-28mm F2.8 IS STM suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- Weight125g lighter, so easier to carry
- Close focusFocuses as close as 20cm
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
- RF16-28mm F2.8 IS STM91mm long × 76.5mm diameter
Specifications compared
| Specification | Canon RF10-20mm F4 L IS STM | Canon RF16-28mm F2.8 IS STM | Difference |
|---|---|---|---|
| Focal length (wide) | 10mm | 16mm | −6mm |
| Focal length (tele) | 20mm | 28mm | −8mm |
| 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 | 20cm | +0.05m |
| Max magnification | 0.12× | 0.26× | −0.14x |
| Aperture blades | 9blades | 9blades | — |
| Weight | 570g | 445g | +125g |
| Length | 112mm | 91mm | +21mm |
| Diameter | 83.7mm | 76.5mm | +7.2mm |
| Filter size | — | 67mm | No data |
| Released | 2023 | 2025 | −2year |
| Stabilization | Yes | Yes | — |
| Weather sealing | Yes | No | Yes |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF10-20mm F4 L IS STM relative to RF16-28mm F2.8 IS STM.The highlighted cell is the better side for that specification.
Check prices
RF10-20mm F4 L IS STM
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RF16-28mm F2.8 IS STM
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 detailRF16-28mm F2.8 IS STM in detailAll RF mount lenses