Canon RF-S18-45mm F4.5-6.3 IS STMvsSigma 18-50mm F2.8 DC DN Contemporary
RF-S18-45mm F4.5-6.3 IS STM
18-45mm / F4.5-6.3
27-68mm equiv.
—
18-50mm F2.8 DC DN Contemporary
18-50mm / F2.8
27-75mm equiv.
—
Which to choose
When the RF-S18-45mm F4.5-6.3 IS STM suits you better
- Weight170g lighter, so easier to carry
- StabilizationHas stabilization
When the 18-50mm F2.8 DC DN Contemporary suits you better
- Brightness1.4 stops brighter — better in low light and blurs the background more
- Close focusFocuses as close as 12cm
- Zoom rangeCovers 18-50mm 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
- RF-S18-45mm F4.5-6.3 IS STM44.3mm long × 69mm diameter
- 18-50mm F2.8 DC DN Contemporary76.5mm long × 65.4mm diameter
Specifications compared
| Specification | Canon RF-S18-45mm F4.5-6.3 IS STM | Sigma 18-50mm F2.8 DC DN Contemporary | Difference |
|---|---|---|---|
| Focal length (wide) | 18mm | 18mm | — |
| Focal length (tele) | 45mm | 50mm | −5mm |
| Max aperture (wide) | F4.5 | F2.8 | 1.4 stops darker |
| Max aperture (tele) | F6.3 | F2.8 | 2.3 stops darker |
| Min aperture | F22 | F22 | — |
| Min focus distance | 15cm | 12cm | +0.03m |
| Max magnification | 0.26× | 0.35× | −0.09x |
| Aperture blades | 7blades | 7blades | — |
| Weight | 130g | 300g | −170g |
| Length | 44.3mm | 76.5mm | −32.2mm |
| Diameter | 69mm | 65.4mm | +3.6mm |
| Filter size | 49mm | 55mm | −6mm |
| Released | 2022 | 2024 | −2year |
| Stabilization | Yes | No | Yes |
| Weather sealing | No | No | — |
| Macro | No | No | — |
| Autofocus | Yes | Yes | — |
The difference column reads as RF-S18-45mm F4.5-6.3 IS STM relative to 18-50mm F2.8 DC DN Contemporary.The highlighted cell is the better side for that specification.
Check prices
RF-S18-45mm F4.5-6.3 IS STM
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18-50mm F2.8 DC DN Contemporary
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RF-S18-45mm F4.5-6.3 IS STM in detail18-50mm F2.8 DC DN Contemporary in detailAll RF-S mount lenses