Canon RF45mm F1.2 STM
The Canon 45mm f/1.2 STM is a 45mm f/1.2 lens designed for Canon RF mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Canon RF45mm F1.2 STM
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Lens Overview — Canon 45mm f/1.2 STM
Key Features — Canon 45mm f/1.2 STM
45mm F1.2 Prime: A standard focal length with one of the widest available maximum apertures in its class, enabling significant subject separation and low-light capability.
Full-Frame RF Mount: Designed exclusively for Canon's RF mirrorless system with full-frame coverage, compatible with bodies like the EOS R5, R6, and R3.
STM Autofocus Motor: Stepping motor technology delivers smooth, quiet autofocus well-suited to both stills and video shooting.
Auto and Manual Focus: Supports switching between autofocus and manual focus, giving shooters flexible control over focus operation.
77mm Filter Thread: A widely used filter diameter that fits into most photographers' existing filter collections without requiring additional adapters.
650g Build Weight: At 650g, the lens has a solid, substantial feel that should be factored into everyday carry and travel setups.
Lens Specifications — Canon 45mm f/1.2 STM
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Landscape, Street, Travel, Video / Cinematography |
| Lens Type | Prime |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 45mm |
| Maximum Aperture | f/1.2 |
| Camera System | Mirrorless |
| Lens Mount | Canon RF |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 77mm |
Description — Canon 45mm f/1.2 STM
The Canon RF 45mm F1.2 STM is a prime lens designed for the Canon RF mirrorless mount, offering full-frame image circle coverage. Its headline specification is the f/1.2 maximum aperture, placing it among the fastest options available in the standard focal length category. At 45mm, the lens sits in a natural perspective range that many photographers find intuitive for a variety of subjects.
Focus options include both autofocus and manual focus, giving shooters the ability to choose their preferred method depending on the situation. The front filter thread measures 77mm, a size that aligns with many other professional lenses and makes filter use straightforward. At 650g, the lens has a solid build weight that reflects its fast-aperture design.
One notable omission from the specification sheet is image stabilization — the imageStabilization field is listed as None, so handheld shooting in challenging conditions will depend on external or in-camera stabilization solutions. This lens is purpose-built for Canon's RF mirrorless ecosystem.
Pros — Canon 45mm f/1.2 STM
- ✓Exceptionally wide f/1.2 maximum aperture allows for strong subject-background separation and low-light flexibility
- ✓45mm standard focal length offers a natural, versatile field of view suited to a broad range of subjects
- ✓Full-frame coverage ensures compatibility with Canon RF full-frame mirrorless bodies
Cons — Canon 45mm f/1.2 STM
- ✗No optical image stabilization, placing the full burden of camera shake compensation on the camera body or shooter technique
- ✗650g weight is considerable for a 45mm prime and may be a factor for photographers prioritizing a lightweight kit
- ✗Single focal length with no zoom capability limits compositional flexibility without physically repositioning