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Canon RF 10–20mm F4 L IS STM vs Canon RF-S 10–18mm F4.5–6.3 IS STM

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

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CanonRF 10–20mm F4 L IS STMCanonRF-S 10–18mm F4.5–6.3 IS STM
Overview
ReleasedOctober 2023November 2023
Optics
Lens typeZoomZoom
Focal length10–20 mm10–18 mm
Maximum aperturef/4f/4.5–6.3
Minimum aperturef/22f/22–32
Optical constructionSixteen elements in twelve groups; designed for use with digital distortion correctionTwelve elements in ten groups
Special elementsOne Super UD, three UD and three glass-moulded aspherical elements; one element is both UD and asphericalTwo UD elements and one plastic-moulded aspherical element; Super Spectra coating
Aperture detail–Maximum f/4.5 at 10 mm and f/6.3 at 18 mm; minimum f/22–32
CoatingsASC, Super Spectra and SWC coatings; front fluorine coating–
DiaphragmNine aperture bladesSeven blades
Angle of view130°25′–94° diagonal, 121°55′–84° horizontal and 100°25′–62° vertical–
ProjectionRectilinear–
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameAPS-C
CompatibilityCanon RF mount for full-frame and APS-C EOS R camerasCanon RF mount with APS-C image circle; full-frame EOS R bodies crop to APS-C; RF extenders not compatible
Teleconverter supportNot compatible with Canon RF extenders–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.25 m0.086 m (manual focus)
Maximum magnification0.12×0.5× (manual focus)
Optical stabilisationYesYes
Autofocus detailSTM autofocus optimised for smooth, near-silent focusing in stills and videoLead-screw STM autofocus and electronic manual focusing; supports compatible cameras' electronic movie focus-breathing correction
Focus distance detailMinimum focus 0.25 mAutofocus minimum 0.14 m throughout 10–18 mm; manual-focus minimum 0.086 m at 10 mm
Magnification detailMaximum 0.12× at 20 mm and 0.06× at 10 mmAutofocus maximum 0.23× at 18 mm; manual-focus maximum 0.5× 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 blurOptical IS rated four stops with EOS R10 at 18 mm under CIPA, yaw/pitch; coordinated IS rated six stops with EOS R7 at 18 mm under CIPA, yaw/pitch
Design
Dust and moisture resistantYesNo
Filter diameter–49 mm
Maximum diameter83.7 mm69 mm
Length112 mm44.9 mm
Weight570 g150 g
ControlsSeparate zoom, focus and customisable control rings; customisable AF stop/function buttonCombined focus/control ring and zoom ring; AF/MF and IS controlled through camera settings
Zoom design–Retractable barrel; lens must be extended for shooting; designed to use camera electronic distortion correction
Filter detailNo front filter thread; rear holder accepts 35 × 20 mm gelatine filters–
Weather resistanceDust and moisture resistant construction with front fluorine coatingNo dust or moisture resistance
Dimensions detail83.7 mm maximum diameter × 112 mm lengthApproximately 69 mm maximum diameter × 44.9 mm length, retracted
Weight detailApproximately 570 g lensApproximately 150 g lens
Lens hoodBuilt-in lens hoodEW-53B hood and LP814 pouch, sold separately
In the boxLens, RF dust cap, Lens Cap 10-20, LP1219 lens case and user manualLens, E-49 front cap, RF lens dust cap and user manual
Release detailOctober 2023 marketed month in Canon Camera MuseumNovember 2023 marketed month in Canon Camera Museum; Japan announcement specified early December 2023 regional availability

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