Canon RF10-20mm F4 L IS STM Lens
The Canon 10-20mm f/4 L IS STM is a 10–20mm f/4 lens designed for Canon RF mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Canon RF10-20mm F4 L IS STM Lens
Get notified when one lists.
We'll text or email you the moment a Canon RF10-20mm F4 L IS STM Lens is listed on GearFocus.
Have a Canon 10-20mm f/4 L IS STM sitting in your bag?
You'd be the first listing for this model.
Serious buyers are already watching — list yours in minutes.
Available Now on GearFocus
Lens Overview — Canon 10-20mm f/4 L IS STM
Key Features — Canon 10-20mm f/4 L IS STM
10-20mm Ultra-Wide Zoom: Covers one of the widest focal length ranges available in the RF lineup, making it well-suited for landscapes, interiors, and architectural photography on full-frame.
Canon L-Series Build: Professional-grade construction with the optical and build standards Canon applies to its L-series lineup, including weather sealing for use in demanding conditions.
Optical Image Stabilization: Built-in OIS helps reduce camera shake when shooting handheld at slow shutter speeds, particularly useful for low-light interiors and video at extreme wide angles.
STM Autofocus Motor: Stepping motor delivers smooth, quiet autofocus suited to both stills and video shooting.
Full-Frame Coverage: Designed specifically for full-frame RF mount bodies, delivering the full ultra-wide angle of view without crop-factor reduction.
77mm Filter Thread: A widely used filter diameter, making it easy to use existing polarizers, ND filters, and other accessories from a standard kit.
Lens Specifications — Canon 10-20mm f/4 L IS STM
| Spec | Detail |
|---|---|
| Use Cases | Landscape, Architecture, Travel, Creative Effects |
| Lens Type | Zoom |
| Format | Full Frame |
| Zoom/Prime | Zoom |
| Focal Length | 10–20mm |
| Maximum Aperture | f/4 |
| Camera System | Mirrorless |
| Lens Mount | Canon RF |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | Optical |
| Filter Thread | 77mm |
Description — Canon 10-20mm f/4 L IS STM
The Canon RF 10-20mm F4 L IS STM is a full-frame ultra-wide-angle zoom lens built for the Canon RF mirrorless mount. Spanning a focal length range of 10mm to 20mm, it delivers an expansive wide-angle perspective suited to landscape, architectural, and interior imaging. The lens maintains a constant maximum aperture of f/4 throughout its zoom range, paired with optical image stabilization to support sharper handheld results.
Both autofocus and manual focus are available, offering flexibility across a variety of shooting styles and workflows. Weighing 570g and featuring a 77mm filter thread, it balances portability with practical usability for photographers who rely on a filter system. As an L-series lens, it occupies Canon's professional tier within the RF ecosystem, targeting shooters who require reliable performance at extreme wide-angle focal lengths.
Pros — Canon 10-20mm f/4 L IS STM
- ✓Exceptionally wide focal length range of 10-20mm covers ultra-wide perspectives on a full-frame sensor
- ✓Optical image stabilization provides handheld shooting support at wide angles
- ✓Supports both autofocus and manual focus for versatile shooting control
Cons — Canon 10-20mm f/4 L IS STM
- ✗Maximum aperture of f/4 is not particularly fast, limiting light-gathering capability in darker conditions
- ✗Exclusive Canon RF mount compatibility means it cannot be used on other mirrorless or DSLR systems without an adapter
- ✗No weather sealing information is confirmed in the available specifications
Videos — Canon 10-20mm f/4 L IS STM
Canon RF 10-20mm f/4L Review: Zooms Can Go THIS Wide?! — PetaPixel