Canon RF100-400mm F5.6-8 IS USMvsCanon RF400mm F2.8 L IS USM
RF100-400mm F5.6-8 IS USM
100-400mm / F5.6-8
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RF400mm F2.8 L IS USM
400mm / F2.8
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Which to choose
When the RF100-400mm F5.6-8 IS USM suits you better
- Weight2255g lighter, so easier to carry
- Close focusFocuses as close as 88cm
- Zoom rangeCovers 100-400mm in a single lens
When the RF400mm F2.8 L IS USM suits you better
- Brightness2.0 stops brighter — better in low light and blurs the background more
- 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
- RF100-400mm F5.6-8 IS USM164.7mm long × 79.5mm diameter
- RF400mm F2.8 L IS USM367mm long × 163mm diameter
Specifications compared
| Specification | Canon RF100-400mm F5.6-8 IS USM | Canon RF400mm F2.8 L IS USM | Difference |
|---|---|---|---|
| Focal length (wide) | 100mm | 400mm | −300mm |
| Focal length (tele) | 400mm | 400mm | — |
| Max aperture (wide) | F5.6 | F2.8 | 2.0 stops darker |
| Max aperture (tele) | F8 | F2.8 | 3.0 stops darker |
| Min aperture | F32 | F32 | — |
| Min focus distance | 88cm | 2.5m | −1.62m |
| Max magnification | 0.41× | 0.17× | +0.24x |
| Aperture blades | 9blades | 9blades | — |
| Weight | 635g | 2.89kg | −2255g |
| Length | 164.7mm | 367mm | −202.3mm |
| Diameter | 79.5mm | 163mm | −83.5mm |
| Filter size | 67mm | 52mm | +15mm |
| Released | 2021 | 2021 | — |
| Stabilization | Yes | Yes | — |
| Weather sealing | No | Yes | No |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF100-400mm F5.6-8 IS USM relative to RF400mm F2.8 L IS USM.The highlighted cell is the better side for that specification.
Check prices
RF100-400mm F5.6-8 IS USM
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RF400mm F2.8 L IS USM
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RF100-400mm F5.6-8 IS USM in detailRF400mm F2.8 L IS USM in detailAll RF mount lenses