Canon RF 50mm f/1.8 STM
The RF 50mm f/1.8 STM is a high-performance RF standard prime lens engineered for Canon EOS R system mirrorless cameras. Features STM autofocus, and premium optical coatings.
Whether you're a seasoned professional or an enthusiast stepping up, the Canon RF 50mm f/1.8 STM offers a compelling balance of performance and utility. Its ultra-fast f/1.8 maximum aperture provides a significant advantage for low-light shooting and subject isolation. At just 160 g (5.6 oz), its remarkably compact design makes it an easy addition to any camera bag.
Optically, it punches well above its weight, ensuring that your creative vision is never limited by your gear. The STM motor ensures smooth, quiet focusing adjustments, particularly beneficial during video capture. While lacking L-series weather sealing, its build quality remains robust and practical for everyday shooting.
For budget-conscious shooters, the RF 50mm f/1.8 STM is an exceptional value, providing access to native RF mount optics without a premium price tag.
✅ Strengths
- Fast f/1.8 aperture for exceptional low-light performance and shallow depth of field
- Ultra-compact and lightweight design (160 g (5.6 oz))
- Customizable Control Ring for aperture, ISO, or exposure compensation
⚠️ Considerations
- No professional weather-sealing gaskets (use caution in rain or dust)
- No in-lens optical stabilization (relies on camera body IBIS only)
- Stepping motor (STM) autofocus may be slower than USM for fast-action tracking
Full Technical Specifications
| Lens Model | Canon RF 50mm f/1.8 STM |
| Lens Mount | Canon RF |
| Sensor Format | Full Frame |
| Optical Construction | 6 elements in 5 groups |
| Special Glass & Optics | 1 Precision Glass-Molded Aspherical element |
| Min. Focus Distance | 0.30 m (11.8 in) |
| Max. Magnification | 0.25x |
| Image Stabilization | Non-stabilized in-lens (uses up to 7.0 stops sensor-shift IBIS) |
| Diaphragm Blades | 7 |
| Autofocus Motor | STM |
| Filter Diameter | 43 mm |
| Dimensions (D × L) | 69.2 mm (2.72 in) × 40.5 mm (1.59 in) |
| Weight | 160 g (5.6 oz) |
| Lens Hood | ES-65B |
| Release Date | 2020-11-04 |
| Series Classification | Standard |
| Estimated MSRP | $499 |
Features & Optical Technology
Recommended Photography Genres
Frequently Asked Questions
Q: Is the RF 50mm f/1.8 STM weather sealed?
A: No, this lens does not feature professional weather sealing. It is recommended to use caution or a rain cover when shooting in wet or dusty conditions.
Q: What size filter does the RF 50mm f/1.8 STM use?
A: The lens features a 43 mm front filter thread. Any circular filters (like UV, CPL, or ND) will need to match this 43 mm diameter.
✓ Includes configurable electronic Control Ring for aperture, ISO, or shutter speed.