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Canon RF 14–35mm F4 L IS USM vs Canon RF 20mm F1.4 L VCM

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CanonRF 14–35mm F4 L IS USMCanonRF 20mm F1.4 L VCM
Overview
ReleasedSeptember 2021April 2025
Optics
Lens typeZoomPrime
Focal length14–35 mm20 mm
Maximum aperturef/4f/1.4
Minimum aperturef/22f/16
Optical constructionSixteen elements in twelve groupsFifteen elements in eleven groups
Special elementsTwo UD elements, one UD aspherical element and two glass-moulded aspherical elements; Super Spectra, SWC and ASC coatings; fluorine coating on the front surface of the front elementOne Super UD, two UD, one BR and two glass-moulded aspherical elements; ASC, SWC and Super Spectra coatings; front fluorine coating
DiaphragmNine blades with circular apertureEleven blades with circular aperture
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon RF mount for full-frame and APS-C EOS R cameras; RF extenders and EF extension tubes not compatibleCanon 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
AutofocusYesYes
Minimum focus distance0.2 m0.2 m
Maximum magnification0.38×0.19×
Optical stabilisationYesNo
Autofocus detailNano USM rear focusing system; full-time manual focus in One-Shot AFRear focusing system driven by a VCM motor
Focus distance detailMinimum focus 0.2 m throughout the zoom rangeMinimum focus 0.2 m
Magnification detailMaximum 0.38× at 35 mmMaximum 0.19×
Stabilisation detailOptical IS rated 5.5 stops with EOS R at 35 mm under CIPA, yaw/pitch; coordinated IS rated seven stops with EOS R5 at 35 mm under CIPA, yaw/pitchNo 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 resistantYesYes
Filter diameter77 mm67 mm
Maximum diameter84.1 mm76.5 mm
Length99.8 mm99.3 mm
Weight540 g519 g
ControlsZoom, electronic manual-focus and customisable control rings; AF/MF and stabiliser on/off switches; automatic panning detectionElectronic 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
Zoom designBarrel extends towards both ends of the zoom range; minimum length near 22 mm; camera-side electronic distortion correction contributes to the compact optical design–
Weather resistanceWeather-resistant seals at the mount, switches, zoom ring, focus ring and control ringDust and moisture resistant construction with mount rubber seal
Dimensions detailApproximately 84.1 mm maximum diameter × 99.8 mm minimum length near 22 mm; maximum length 107.9 mm at 35 mm (Canon USA specifications)Approximately 76.5 mm maximum diameter × 99.3 mm length
Weight detailApproximately 540 g lensApproximately 519 g lens
Lens hoodEW-83P petal hood includedEW-73H hood included
In the boxLens, E-77 II front cap, RF dust cap, EW-83P hood, LP1219 soft case and user manualLens, E-67 II front cap, RF dust cap, EW-73H hood, LP1219 case, rear filter holder and user manual
Release detailSeptember 2021 marketed month in Canon Camera MuseumApril 2025 marketed month in Canon Camera Museum

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