Canon RF100-500mm F4.5-7.1 L IS USMvsCanon RF400mm F2.8 L IS USM
RF100-500mm F4.5-7.1 L IS USM
100-500mm / F4.5-7.1
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RF400mm F2.8 L IS USM
400mm / F2.8
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Which to choose
When the RF100-500mm F4.5-7.1 L IS USM suits you better
- Weight1520g lighter, so easier to carry
- Close focusFocuses as close as 90cm
- Zoom rangeCovers 100-500mm in a single lens
When the RF400mm F2.8 L IS USM suits you better
- Brightness1.4 stops brighter — better in low light and blurs the background more
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
- RF100-500mm F4.5-7.1 L IS USM207.6mm long × 93.8mm diameter
- RF400mm F2.8 L IS USM367mm long × 163mm diameter
Specifications compared
| Specification | Canon RF100-500mm F4.5-7.1 L IS USM | Canon RF400mm F2.8 L IS USM | Difference |
|---|---|---|---|
| Focal length (wide) | 100mm | 400mm | −300mm |
| Focal length (tele) | 500mm | 400mm | +100mm |
| Max aperture (wide) | F4.5 | F2.8 | 1.4 stops darker |
| Max aperture (tele) | F7.1 | F2.8 | 2.7 stops darker |
| Min aperture | F32 | F32 | — |
| Min focus distance | 90cm | 2.5m | −1.60m |
| Max magnification | 0.33× | 0.17× | +0.16x |
| Aperture blades | 9blades | 9blades | — |
| Weight | 1.37kg | 2.89kg | −1520g |
| Length | 207.6mm | 367mm | −159.4mm |
| Diameter | 93.8mm | 163mm | −69.2mm |
| Filter size | 77mm | 52mm | +25mm |
| Released | 2020 | 2021 | −1year |
| Stabilization | Yes | Yes | — |
| Weather sealing | Yes | Yes | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF100-500mm F4.5-7.1 L IS USM relative to RF400mm F2.8 L IS USM.The highlighted cell is the better side for that specification.
Check prices
RF100-500mm F4.5-7.1 L IS USM
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RF400mm F2.8 L IS USM
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RF100-500mm F4.5-7.1 L IS USM in detailRF400mm F2.8 L IS USM in detailAll RF mount lenses