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Canon RF 10–20mm F4 L IS STM vs Canon RF 14mm F1.4L VCM

Every spec side by side, from each maker's published figures.

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CanonRF 10–20mm F4 L IS STMCanonRF 14mm F1.4L VCM
Overview
ReleasedOctober 2023February 2026
Optics
Lens typeZoomPrime
Focal length10–20 mm14 mm
Maximum aperturef/4f/1.4
Minimum aperturef/22f/16
Optical constructionSixteen elements in twelve groups; designed for use with digital distortion correction18 elements in 13 groups
Special elementsOne Super UD, three UD and three glass-moulded aspherical elements; one element is both UD and asphericalOne fluorite, one UD, one BR and three glass-moulded aspherical elements
CoatingsASC, Super Spectra and SWC coatings; front fluorine coatingTwo ASC coatings, SWC and Super Spectra; fluorine coating on the front element
Aperture detail–f/1.4–16; iris ring supports stepless aperture control in video, with stills compatibility dependent on camera model
DiaphragmNine aperture blades11 circular aperture blades
Angle of view130°25′–94° diagonal, 121°55′–84° horizontal and 100°25′–62° vertical104° horizontal, 81° vertical and 114° diagonal on full frame
ProjectionRectilinearRectilinear ultra-wide design
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon RF mount for full-frame and APS-C EOS R camerasCanon EOS R cameras; full-frame image circle; iris-ring functions depend on the camera and firmware
Teleconverter supportNot compatible with Canon RF extendersCanon RF extenders not compatible
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.25 m0.24 m
Maximum magnification0.12×0.11×
Optical stabilisationYesNo
Autofocus detailSTM autofocus optimised for smooth, near-silent focusing in stills and videoVoice Coil Motor autofocus; electronic manual focus ring; maker rear-focus design maintains lens length during focusing
Focus distance detailMinimum focus 0.25 m–
Magnification detailMaximum 0.12× at 20 mm and 0.06× at 10 mm–
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 lens optical IS; maker lists camera IBIS CIPA-2024 performance of 6.5 stops at the centre and 2.5 at the corners, subject to the compatible camera/test conditions
Video features–Stepless iris ring; Canon Japan identifies EOS R1/EOS R5 Mark II stills iris-ring support; the US launch also names EOS R6 Mark III; do not assume the same support on every EOS R body
Design
Dust and moisture resistantYesYes
Maximum diameter83.7 mm76.5 mm
Length112 mm112 mm
Weight570 g578 g
ControlsSeparate zoom, focus and customisable control rings; customisable AF stop/function buttonCustomisable control ring, electronic focus ring, iris ring with Auto-position lock, AF/MF switch and custom function button (controls confirmed by Digital Camera World)
Filter detailNo front filter thread; rear holder accepts 35 × 20 mm gelatine filtersNo front screw-in filter thread; rear gelatin-filter holder for 36.7 × 29.4 mm filters
Weather resistanceDust and moisture resistant construction with front fluorine coatingDust and moisture resistant structure with mount gasket; Canon states resistance requires attachment to a camera and cannot prevent all dust or water ingress; no IP rating inferred
Dimensions detail83.7 mm maximum diameter × 112 mm lengthApproximately 76.5 mm maximum diameter × 112 mm length; integral hood
Weight detailApproximately 570 g lensApproximately 578 g lens
Lens hoodBuilt-in lens hoodBuilt into the lens barrel; maker lists lens cap 14B, Lens Dust Cap RF and pouch LP1219 as accessories
In the boxLens, RF dust cap, Lens Cap 10-20, LP1219 lens case and user manual–
Release detailOctober 2023 marketed month in Canon Camera MuseumCanon Japan specifies first sale on 20 February 2026; US announcement expected availability by the end of February, rather than the same exact regional day

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