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Canon EF 50mm f/1.2L USM vs Canon RF 50mm F1.2 L USM

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

Better figure, where one is clearly better

CanonEF 50mm f/1.2L USMCanonRF 50mm F1.2 L USM
Overview
ReleasedJanuary 2007October 2018
Optics
Lens typePrimePrime
Focal length50 mm50 mm
Maximum aperturef/1.2f/1.2
Minimum aperturef/16f/16
Optical constructionEight elements in six groupsFifteen elements in nine groups
Special elementsLarge-diameter, high-precision aspherical glass element according to Canon's manual and Camera MuseumOne UD element, two ground and polished aspherical elements and one glass-moulded aspherical element; Air Sphere Coating
CoatingsSuper Spectra coating according to Canon UK's store–
DiaphragmEight circular blades according to Canon Camera MuseumTen blades with circular aperture
Angle of view46° diagonal, 40° horizontal and 27° vertical–
Mount and compatibility
MountsCanon EFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EF full-frame and APS-C camerasCanon RF mount for full-frame and APS-C EOS R cameras; not compatible with EOS DSLRs
Teleconverter supportEF 1.4X II and EF 2X II cannot be used according to Canon's manual–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.45 m0.4 m
Maximum magnification0.15×0.19×
Optical stabilisationNoNo
Autofocus detailRing USM with mechanical full-time manual focus; Canon's manual permits adjustment after One Shot AF while holding the shutter button halfwayRing-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 detailEF12 II extension tube gives 0.24–0.39×; EF25 II gives 0.53–0.67×; Canon recommends manual focus with extension tubesMaximum 0.19×
Stabilisation detail–No optical image stabiliser (Cameralabs)
Design
Dust and moisture resistantYesYes
Filter diameter72 mm77 mm
Maximum diameter85.8 mm89.8 mm
Length65.5 mm108 mm
Weight580 g950 g
ControlsAF/MF switch, focusing ring, distance scale, depth-of-field scale and infrared index according to Canon's manualElectronic manual-focus and customisable control rings; AF/MF and focus-limiter switches
Weather resistanceCanon's manual requires a separately sold 72 mm Canon PROTECT filter for dust and water resistance because the front element moves when focusing; without the filter it is not dust or water resistantDust and moisture resistant construction
Dimensions detail85.8 mm diameter × 65.5 mm length according to Canon UK; manual measures length from the mount surface to the front, with caps adding 21.5 mm; Canon USA instead lists 85.4 mm diameterApproximately 89.8 mm maximum diameter × 108 mm length
Weight detailCanon UK's specification page lists 580 g; its store, Canon Camera Museum and the manual list 590 g, while Canon USA lists 545 g lens-only; the manual states its weight excludes accessoriesApproximately 950 g lens
Lens hoodSupplied ES-78 hood; reversible for storage according to Canon's manualES-83 hood included
In the boxLens, E-72U cap, Lens Dust Cap E, ES-78 hood, LP1214 case and user manual according to Canon UK's storeLens, E-77 II front cap, RF dust cap, ES-83 hood, LP1319 case and user manual
Release detailCanon Camera Museum and Canon's 2021 retrospective record January 2007 release; the August 2006 Japanese announcement initially planned late November 2006October 2018 marketed month in Canon Camera Museum

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