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Canon RF 10–20mm F4 L IS STM vs Canon RF 20mm F1.4 L VCM

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CanonRF 10–20mm F4 L IS STMCanonRF 20mm F1.4 L VCM
Overview
ReleasedOctober 2023April 2025
Optics
Lens typeZoomPrime
Focal length10–20 mm20 mm
Maximum aperturef/4f/1.4
Minimum aperturef/22f/16
Optical constructionSixteen elements in twelve groups; designed for use with digital distortion correctionFifteen elements in eleven groups
Special elementsOne Super UD, three UD and three glass-moulded aspherical elements; one element is both UD and asphericalOne Super UD, two UD, one BR and two glass-moulded aspherical elements; ASC, SWC and Super Spectra coatings; front fluorine coating
CoatingsASC, Super Spectra and SWC coatings; front fluorine coating–
DiaphragmNine aperture bladesEleven blades with circular aperture
Angle of view130°25′–94° diagonal, 121°55′–84° horizontal and 100°25′–62° vertical–
ProjectionRectilinear–
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon RF mount for full-frame and APS-C EOS R camerasCanon 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
Teleconverter supportNot compatible with Canon RF extenders–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.25 m0.2 m
Maximum magnification0.12×0.19×
Optical stabilisationYesNo
Autofocus detailSTM autofocus optimised for smooth, near-silent focusing in stills and videoRear focusing system driven by a VCM motor
Focus distance detailMinimum focus 0.25 mMinimum focus 0.2 m
Magnification detailMaximum 0.12× at 20 mm and 0.06× at 10 mmMaximum 0.19×
Stabilisation detailUp to five stops optical stabilisation tested with EOS R at 20 mm, or six stops coordinated stabilisation with EOS R3 at 20 mm; CIPA yaw and pitch testing. Peripheral Coordinated Control IS also compensates for peripheral blurNo 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 diameter–67 mm
Maximum diameter83.7 mm76.5 mm
Length112 mm99.3 mm
Weight570 g519 g
ControlsSeparate zoom, focus and customisable control rings; customisable AF stop/function buttonElectronic manual-focus, customisable control and smooth-action iris rings; iris Auto-position lock; customisable lens function button; AF/MF switch
Filter detailNo front filter thread; rear holder accepts 35 × 20 mm gelatine filters67 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 resistanceDust and moisture resistant construction with front fluorine coatingDust and moisture resistant construction with mount rubber seal
Dimensions detail83.7 mm maximum diameter × 112 mm lengthApproximately 76.5 mm maximum diameter × 99.3 mm length
Weight detailApproximately 570 g lensApproximately 519 g lens
Lens hoodBuilt-in lens hoodEW-73H hood included
In the boxLens, RF dust cap, Lens Cap 10-20, LP1219 lens case and user manualLens, E-67 II front cap, RF dust cap, EW-73H hood, LP1219 case, rear filter holder and user manual
Release detailOctober 2023 marketed month in Canon Camera MuseumApril 2025 marketed month in Canon Camera Museum

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