Canon RF100-300mm F2.8 L IS USMvsCanon RF75-300mm F4-5.6
RF100-300mm F2.8 L IS USM
100-300mm / F2.8
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RF75-300mm F4-5.6
75-300mm / F4-5.6
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Which to choose
When the RF100-300mm F2.8 L IS USM suits you better
- Brightness1.0 stops brighter — better in low light and blurs the background more
- StabilizationHas stabilization
- Weather sealingHas weather sealing
When the RF75-300mm F4-5.6 suits you better
- Weight2083g lighter, so easier to carry
- Close focusFocuses as close as 1.5m
- Zoom rangeCovers 75-300mm 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
- RF100-300mm F2.8 L IS USM323.4mm long × 128mm diameter
- RF75-300mm F4-5.6146.1mm long × 71.2mm diameter
Specifications compared
| Specification | Canon RF100-300mm F2.8 L IS USM | Canon RF75-300mm F4-5.6 | Difference |
|---|---|---|---|
| Focal length (wide) | 100mm | 75mm | +25mm |
| Focal length (tele) | 300mm | 300mm | — |
| Max aperture (wide) | F2.8 | F4 | 1.0 stops brighter |
| Max aperture (tele) | F2.8 | F5.6 | 2.0 stops brighter |
| Min aperture | F22 | F32 | −10.0 |
| Min focus distance | 1.8m | 1.5m | +0.30m |
| Max magnification | 0.16× | 0.25× | −0.09x |
| Aperture blades | 9blades | 7blades | +2blades |
| Weight | 2.59kg | 507g | +2083g |
| Length | 323.4mm | 146.1mm | +177.3mm |
| Diameter | 128mm | 71.2mm | +56.8mm |
| Filter size | 112mm | 58mm | +54mm |
| Released | 2023 | 2025 | −2year |
| Stabilization | Yes | No | Yes |
| Weather sealing | Yes | No | Yes |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF100-300mm F2.8 L IS USM relative to RF75-300mm F4-5.6.The highlighted cell is the better side for that specification.
Check prices
RF100-300mm F2.8 L IS USM
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RF75-300mm F4-5.6
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.
RF100-300mm F2.8 L IS USM in detailRF75-300mm F4-5.6 in detailAll RF mount lenses