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Canon RF 20-50mm F4L IS USM PZ vs Canon RF 50mm F1.2 L USM

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

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CanonRF 20-50mm F4L IS USM PZCanonRF 50mm F1.2 L USM
Overview
ReleasedJune 2026October 2018
Optics
Lens typeZoomPrime
Focal length20–50 mm50 mm
Maximum aperturef/4f/1.2
Minimum aperturef/22f/16
Optical construction13 elements in 11 groupsFifteen elements in nine groups
Special elementsTwo glass-moulded aspherical and three UD elementsOne UD element, two ground and polished aspherical elements and one glass-moulded aspherical element; Air Sphere Coating
CoatingsASC and Super Spectra; fluorine coating on the front element–
Aperture detailConstant maximum f/4, minimum f/22 throughout the range–
DiaphragmNine aperture bladesTen blades with circular aperture
Angle of viewHorizontal 84°–40°, vertical 62°–27° and diagonal 94°–46° on full frame–
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EOS R cameras; full-frame image circle; power-zoom control from camera body or remote devices depends on compatible model and firmwareCanon RF mount for full-frame and APS-C EOS R cameras; not compatible with EOS DSLRs
Teleconverter supportCanon RF extenders not compatible–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.24 m0.4 m
Maximum magnification0.33×0.19×
Optical stabilisationYesNo
Autofocus detailNano USM autofocus; full-time manual focus; maker rear-focus design retains length during focusingRing-type USM; electronic manual focusing with full-time manual override
Focus distance detail–Minimum focus 0.4 m; focus limiter selects full range or 0.8 m–infinity (Cameralabs)
Magnification detailMaker maximum magnification 0.14× at 20 mm or 0.33× at 50 mm; no AF/MF mode specified in the tableMaximum 0.19×
Stabilisation detailMaker six-stop optical IS or combined camera/lens eight stops at centre and corners under CIPA-2024, at maximum focal length with its specified camera; not guaranteed in every shooting setupNo optical image stabiliser (Cameralabs)
Video featuresInternal multi-speed power zoom and optically suppressed focus breathing; zoom ring switches between powered and conventional manual operation–
Design
Dust and moisture resistantYesYes
Filter diameter67 mm77 mm
Maximum diameter79.9 mm89.8 mm
Length98.4 mm108 mm
Weight420 g950 g
ControlsCustomisable control ring, focus ring and zoom ring; PZ/MZ selector, custom button, AF/MF and stabiliser switches (Digital Camera World; ePHOTOzine)Electronic manual-focus and customisable control rings; AF/MF and focus-limiter switches
Zoom designInternal zoom/focus keeps barrel length fixed; ePHOTOzine describes conventional mechanical manual zoom, while Digital Camera World's prose calls it fly-by-wire; no silent choice between those reviewer descriptions–
Filter detail67 mm front screw-in filter thread–
Weather resistanceDust and moisture resistant with mount gasket; maker warns camera attachment is required and protection cannot prevent all dust or water ingress; no waterproof/IP rating inferredDust and moisture resistant construction
Dimensions detailApproximately 79.9 mm maximum diameter × 98.4 mm lengthApproximately 89.8 mm maximum diameter × 108 mm length
Weight detailApproximately 420 g lensApproximately 950 g lens
Lens hoodES-73B; maker lists E-67 II cap, Lens Dust Cap RF and LP1219 pouch as accessoriesES-83 hood included
In the box–Lens, E-77 II front cap, RF dust cap, ES-83 hood, LP1319 case and user manual
Release detailCanon Japan's 11 June 2026 notice confirms first sale from 26 June 2026, resolving the earlier late-June launch wordingOctober 2018 marketed month in Canon Camera Museum

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