Standard Lens

Canon RF 50mm F1.8 STM

Explore your creativity and expand your photography skills with this remarkably compact and affordable prime lens that delivers more than you thought possible.


See it in action

Watch the video with Ejiro Dafé, professional photographer and director, showcasing his work with the RF 50mm F1.8 STM lens.

Achieve sharp focus and create impact with out of focus backgrounds

Recreate that cinema look and take your photography to a new level of creativity by experimenting with different apertures.

Wide aperture creativity

Create artistic and impactful images at lower ISO thanks to a wide f/1.8 aperture that achieves sharp focus on a subject yet delivers a beautiful blurred background.
RF 50mm F1.8 STM ejiro dafe sample look3 wide aperture

Sharp, quiet focusing

The STM (Stepping Motor) technology focuses very smoothly and in near-silence, ideal for stills and video. Super Spectra Coating on the lens elements ensure quality.
RF 50mm F1.8 STM ejiro dafe sample look1 quiet focusing

Compact and lightweight

At 160g and 40.5mm, it is a highly compact and lightweight partner for your day-to-day shooting with EOS R-series cameras, with no adapter required.
RF 50mm F1.8 STM john dickins lifestyle compact and lightweight

Considered design

Very discreet with a combined focusing and control ring for intuitive control, the lens has a 7-blade circular aperture for superb bokeh and focuses to 0.3m.
RF 50mm F1.8 STM lifestyle considered design

Great lens for…

The RF 50mm F1.8 STM lens is a simple yet hugely versatile lens. Its superior sharpness, great low light performance and stunning bokeh make it ideal for many types of photography and video.

RF 50mm F1.8 STM ejiro dafe sample ef comp get closer 1
RF 50mm F1.8 STM ejiro dafe sample ef comp get closer 2


Get closer

The RF 50mm F1.8 STM lens focusses down to 30cm - a useful 5cm closer than the popular EF 50mm f/1.8 STM lens. The image on the left is taken with the EF 50mm lens at 35cm, while the image on the right is taken with the RF 50mm F1.8 STM at 30cm.


  • STM Motor

    Smooth, fast, near silent autofocus

  • Wide f/1.8 aperture

    Great for low light and stunning bokeh

  • Aspheric lens element

    Superior sharpness from centre to edge

  • RF mount

    Compact design with better performance

  • Super Spectra Coating

    Improves image quality and colour rendering

  • Creativity at lower cost

    Natural perspective and affordable



See how the RF 50mm F1.8 STM compares to its EF counterpart and the L-series RF 50mm F1.2L





Maximum aperture




Minimum focusing distance




Lens construction

6 elements in 5 groups

6 elements in 5 groups

15 elements in 9 groups

Special low dispersion glass

PMo Aspherical element


UD element

Aspherical element

Special coating

Super Spectra Coating

Super Spectra Coating

Air Sphere Coating, fluorine coating


Not supported

Not supported


Aperture blades




IS (CIPA standard correction effect)

Not supported

Not supported

Not supported

Filter diameter




Maximum diameter and length

Approx. 69.2 mm x 40.5 mm

Approx. 69.2 mm x 39.3 mm

Approx. 89.8 mm x 108.0 mm






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RF 50mm F1.8 STM side image

What’s in the box

Just add an EOS R full frame mirrorless camera and you’ll be up and running in no time.

  • RF 50mm F1.8 STM

  • Lens Cap E-43

  • Lens Dust Cap RF

Hands holding a Canon EOS R camera and a Canon RF 24-105mm F4-7.1 IS STM lens.

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