Canon RF 10-20mm F4 L IS STM vs Canon RF 28mm F2.8 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 28mm F2.8 STM is faster by 1 stop (f/2.8 vs f/4.0), letting in more light.
- Canon RF 28mm F2.8 STM is lighter by 450g.
- Canon RF 10-20mm F4 L IS STM goes wider (10mm vs 28mm).
- Canon RF 28mm F2.8 STM reaches further (28mm vs 20mm).
| Spec | RF 10-20mm F4 L IS STM | RF 28mm F2.8 STM |
|---|---|---|
| Brand | Canon | Canon |
| Mount | Canon RF | Canon RF |
| Type | Wide Zoom | Prime |
| Focal length | 10-20mm (wider) | 28mm |
| Max aperture | f/4.0 | f/2.8 (faster) |
| Released | 2023 | 2023 |
| Blades | 9 | 7 |
| Format | full-frame | full-frame |
| Groups | 12 | 6 |
| Af motor | STM | STM |
| Elements | 16 | 8 |
| Weight g | 570.0 | 120.0 (lighter) |
| Length mm | 112.0 | 24.7 |
| Stabilized | Yes | n/a |
| Diameter mm | 83.7 | 69.2 |
| Min focus m | 0.25 | 0.23 (closer focusing) |
| Max magnification | 0.12 | 0.17 |
| Filter mm | n/a | 55 |
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 28mm F2.8 STM
A tiny pancake wide prime for Canon RF full-frame cameras with a stepping motor.
Pros
- Pancake size (120 g)
- STM focusing
- Wide 28mm view
Cons
- f/2.8
- No IS
- Relies on digital correction