Canon RF 10-20mm F4 L IS STM vs Canon RF-S 10-18mm F4.5-6.3 IS STM
Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.
Verdict at a glance
- Canon RF 10-20mm F4 L IS STM is faster by 0.3 stops (f/4.0 vs f/4.5), letting in more light.
- Canon RF-S 10-18mm F4.5-6.3 IS STM is lighter by 420g.
- Canon RF 10-20mm F4 L IS STM reaches further (20mm vs 18mm).
| Spec | RF 10-20mm F4 L IS STM | RF-S 10-18mm F4.5-6.3 IS STM |
|---|---|---|
| Brand | Canon | Canon |
| Mount | Canon RF | Canon RF |
| Type | Wide Zoom | Wide Zoom |
| Focal length | 10-20mm | 10-18mm |
| Max aperture | f/4.0 (faster) | f/4.5 |
| Released | 2023 | 2023 |
| Blades | 9 | 7 |
| Format | full-frame | aps-c |
| Groups | 12 | 10 |
| Af motor | STM | STM |
| Elements | 16 | 12 |
| Weight g | 570.0 | 150.0 (lighter) |
| Length mm | 112.0 | 44.9 |
| Stabilized | Yes | Yes |
| Diameter mm | 83.7 | 69.0 |
| Min focus m | 0.25 | n/a |
| Max magnification | 0.12 | n/a |
Canon RF 10-20mm F4 L IS STM
A full-frame ultra-wide zoom for Canon RF mirrorless cameras with image stabilization and a constant f/4 aperture. L-series build.
Pros
- Very wide 10mm start
- Constant f/4
- Image stabilization
- L-series build
Cons
- Bulbous front element limits filter use
- Slower than f/2.8 wide zooms
- Software distortion correction is part of the design
Canon RF-S 10-18mm F4.5-6.3 IS STM
The RF-S 10-18mm F4.5-6.3 IS STM is a compact ultra-wide zoom for Canon APS-C RF cameras with stabilization, giving about a 16-29mm full-frame equivalent.
Pros
- Very compact (150 g)
- Image stabilization
- Wide-angle view on APS-C
Cons
- Slow variable aperture
- Relies on in-camera distortion correction