Canon EF 50mm f/1.4 USM vs Canon RF 50mm F1.2 L USM

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EF 50mm f/1.4 USM compared with RF 50mm F1.2 L USM

	CanonEF 50mm f/1.4 USM	CanonRF 50mm F1.2 L USM
Overview
Released
Released	June 1993	October 2018
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	50 mm	50 mm
Maximum aperture
Maximum aperture	f/1.4	f/1.2
Minimum aperture
Minimum aperture	f/22	f/16
Optical construction
Optical construction	Seven elements in six groups	Fifteen elements in nine groups
Special elements
Special elements	Two high-refraction glass elements according to Canon Camera Museum	One UD element, two ground and polished aspherical elements and one glass-moulded aspherical element; Air Sphere Coating
Coatings
Coatings	Super Spectra coating according to Canon UK	–
Diaphragm
Diaphragm	Eight blades; Canon UK's store describes a circular diaphragm, while Photozone finds angular highlights when stopped down	Ten blades with circular aperture
Angle of view
Angle of view	46° diagonal, 40° horizontal and 27° vertical	–
Mount and compatibility
Mounts
Mounts	Canon EF	Canon RF
Image circle
Image circle	Full frame	Full frame
Compatibility
Compatibility	Canon EF full-frame and APS-C cameras	Canon RF mount for full-frame and APS-C EOS R cameras; not compatible with EOS DSLRs
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.45 m	0.4 m
Maximum magnification
Maximum magnification	0.15×	0.19×
Optical stabilisation
Optical stabilisation	No	No
Autofocus detail
Autofocus detail	Micro USM with mechanical full-time manual focus; Canon's manual permits adjustment after One Shot AF while holding the shutter button halfway	Ring-type USM; electronic manual focusing with full-time manual override
Focus distance detail
Focus distance detail	Overall linear extension focusing according to Canon USA; front filter thread does not rotate according to The Digital Picture	Minimum focus 0.4 m; focus limiter selects full range or 0.8 m–infinity (Cameralabs)
Magnification detail
Magnification detail	EF12 II extension tube gives 0.24–0.39×; EF25 II gives 0.53–0.68× according to Canon UK	Maximum 0.19×
Stabilisation detail
Stabilisation detail	No image stabilisation according to The Digital Picture's exact-model specification table	No optical image stabiliser (Cameralabs)
Design
Dust and moisture resistant
Dust and moisture resistant	No	Yes
Filter diameter
Filter diameter	58 mm	77 mm
Maximum diameter
Maximum diameter	73.8 mm	89.8 mm
Length
Length	50.5 mm	108 mm
Weight
Weight	290 g (better)	950 g
Controls
Controls	AF/MF switch, focusing ring, distance scale and infrared index according to Canon's manual	Electronic manual-focus and customisable control rings; AF/MF and focus-limiter switches
Weather resistance
Weather resistance	No weather sealing according to The Digital Picture's exact-model specification table	Dust and moisture resistant construction
Dimensions detail
Dimensions detail	73.8 mm diameter × 50.5 mm length in the retracted state according to Canon UK; Canon's manual measures length from the mount surface to the front, with caps adding 21.5 mm	Approximately 89.8 mm maximum diameter × 108 mm length
Weight detail
Weight detail	290 g for the lens only according to Canon's manual	Approximately 950 g lens
Lens hood
Lens hood	Optional ES-71 II hood; reversible for storage according to Canon's manual	ES-83 hood included
In the box
In the box	Lens, E-58II cap, Lens Dust Cap E and user manual according to Canon UK's store	Lens, E-77 II front cap, RF dust cap, ES-83 hood, LP1319 case and user manual
Release detail
Release detail	Canon Camera Museum records June 1993 marketing	October 2018 marketed month in Canon Camera Museum