Canon · RF

RF 20mm F1.4 L VCM

Released April 2025

A full-frame f/1.4 ultra-wide prime for EOS R cameras, with VCM autofocus, a smooth iris ring, rear gel-filter holder and dust and moisture resistant construction.

Mount
Canon RF
Focal length
20 mm
Max aperture
f/1.4
Stabilisation
No
Weight
519 g

What reviewers say

Both reviews praise quick autofocus, solid construction and bright-aperture night shooting. Live Science finds crisp central stars but softer, stretched stars towards the edges at f/1.4. Photography Blog's EOS R6 Mark III tests likewise favour stopped-down edges, while stressing that RAW distortion and vignetting need correction. Its reviewer also finds the separate aperture controls unnecessarily complicated.

From livescience.com, photographyblog.com, photographyblog.com and photographyblog.com

Optics

Lens type
Prime
Focal length
20 mm
Maximum aperture
f/1.4
Minimum aperture
f/16
Optical construction
Fifteen elements in eleven groups
Special elements
One Super UD, two UD, one BR and two glass-moulded aspherical elements; ASC, SWC and Super Spectra coatings; front fluorine coating
Diaphragm
Eleven blades with circular aperture

Mount and compatibility

Mounts
Canon RF
Image circle
Full frame
Compatibility
Canon RF mount for full-frame and APS-C EOS R cameras; RF extenders not compatible. Iris ring provides movie aperture control; Canon lists EOS R, RP, Ra, R3, R5, R6, R6 Mark II, R7, R8, R10, R50, R100 and R5 C as unable to set still-photo aperture with this ring even with their latest firmware

Focus and stabilisation

Autofocus
Yes
Minimum focus distance
0.2 m
Maximum magnification
0.19×
Optical stabilisation
No
Autofocus detail
Rear focusing system driven by a VCM motor
Focus distance detail
Minimum focus 0.2 m
Magnification detail
Maximum 0.19×
Stabilisation detail
No optical stabiliser; Canon rates EOS R1 in-body stabilisation at 8 stops centrally and 5 stops in the corners under CIPA-2024 testing

Design

Dust and moisture resistant
Yes
Filter diameter
67 mm
Maximum diameter
76.5 mm
Length
99.3 mm
Weight
519 g
Controls
Electronic manual-focus, customisable control and smooth-action iris rings; iris Auto-position lock; customisable lens function button; AF/MF switch
Filter detail
67 mm front thread and rear filter holder; Canon specifies a single rear filter no thicker than 0.2 mm and recommends removing the holder when unused to avoid possible ghosting
Weather resistance
Dust and moisture resistant construction with mount rubber seal
Dimensions detail
Approximately 76.5 mm maximum diameter × 99.3 mm length
Weight detail
Approximately 519 g lens
Lens hood
EW-73H hood included
In the box
Lens, E-67 II front cap, RF dust cap, EW-73H hood, LP1219 case, rear filter holder and user manual
Release detail
April 2025 marketed month in Canon Camera Museum

Pros and cons

Pros

  • f/1.4 maximum aperture
  • Separate iris ring and customisable lens function button
  • Dust and moisture resistant construction

Cons

  • No optical stabilisation
  • Iris-ring still-photo control unavailable on listed older cameras
  • RF extenders not compatible

Closest rivals

Model
MountFocal lengthMax apertureStabilisationWeightReleased
Canon RF24 mmf/1.4No515 gDec 2024
Canon RF14 mmf/1.4No578 gFeb 2026
Canon RF24 mmf/1.8Yes270 gAug 2022

Sources

  1. canon.co.uk/lenses/rf-20mm-f1-4l-vcm/specifications
  2. canon.co.uk/store/canon-rf-20mm-f1-4l-vcm-lens/7023C005
  3. global.canon/en/c-museum/product/rf548.html
  4. livescience.com/products/optics/canon-rf-20mm-f-1-4l-vcm-review
  5. photographyblog.com/reviews/canon_rf_20mm_f1_4l_vcm_review
  6. photographyblog.com/reviews/canon_rf_20mm_f1_4l_vcm_review/sharpness_1
  7. photographyblog.com/reviews/canon_rf_20mm_f1_4l_vcm_review/conclusion

Photo: Canon Asia Photo Library; official press archive member RF20mm f1.4L VCM Front Slant.jpg; complete supplied canvas and white background retained.

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