Canon RF 135mm F1.8 L IS USM vs Canon RF 20mm F1.4 L VCM

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RF 135mm F1.8 L IS USM compared with RF 20mm F1.4 L VCM

	CanonRF 135mm F1.8 L IS USM	CanonRF 20mm F1.4 L VCM
Overview
Released
Released	January 2023	April 2025
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	135 mm	20 mm
Maximum aperture
Maximum aperture	f/1.8	f/1.4
Minimum aperture
Minimum aperture	f/22	f/16
Optical construction
Optical construction	Seventeen elements in twelve groups	Fifteen elements in eleven groups
Special elements
Special elements	Three UD elements	One Super UD, two UD, one BR and two glass-moulded aspherical elements; ASC, SWC and Super Spectra coatings; front fluorine coating
Coatings
Coatings	ASC and Super Spectra coatings; front-element fluorine coating	–
Diaphragm
Diaphragm	Nine blades with circular aperture	Eleven blades with circular aperture
Angle of view
Angle of view	Approximately 18° diagonal	–
Mount and compatibility
Mounts
Mounts	Canon RF	Canon RF
Image circle
Image circle	Full frame	Full frame
Compatibility
Compatibility	Canon RF mount for full-frame and APS-C EOS R cameras	Canon RF mount for full-frame and APS-C EOS R cameras; RF extenders not compatible. Iris ring provides movie aperture control; Canon lists EOS R, RP, Ra, R3, R5, R6, R6 Mark II, R7, R8, R10, R50, R100 and R5 C as unable to set still-photo aperture with this ring even with their latest firmware
Teleconverter support
Teleconverter support	Canon RF 1.4× and 2× extenders not compatible	–
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.7 m	0.2 m
Maximum magnification
Maximum magnification	0.26×	0.19×
Optical stabilisation
Optical stabilisation	Yes	No
Autofocus detail
Autofocus detail	Nano USM; full-time manual focusing supported in One Shot AF and Servo AF on compatible EOS R-series cameras	Rear focusing system driven by a VCM motor
Focus distance detail
Focus distance detail	Minimum focus 0.70 m; no distance limiter switch	Minimum focus 0.2 m
Magnification detail
Magnification detail	Maximum 0.26×; approximately 135 × 91 mm field of view at minimum focus	Maximum 0.19×
Stabilisation detail
Stabilisation detail	Up to 5.5 stops optical IS with EOS R; up to 8 stops coordinated with EOS R3 IBIS, under CIPA yaw/pitch testing	No optical stabiliser; Canon rates EOS R1 in-body stabilisation at 8 stops centrally and 5 stops in the corners under CIPA-2024 testing
Video features
Video features	Focus breathing correction available on compatible cameras	–
Design
Dust and moisture resistant
Dust and moisture resistant	Yes	Yes
Filter diameter
Filter diameter	82 mm	67 mm
Maximum diameter
Maximum diameter	89.2 mm	76.5 mm
Length
Length	130.3 mm	99.3 mm
Weight
Weight	935 g	519 g (better)
Controls
Controls	Separate electronic manual-focus and customisable control rings; two customisable lens function buttons default to AF stop; AF/MF and stabiliser switches	Electronic manual-focus, customisable control and smooth-action iris rings; iris Auto-position lock; customisable lens function button; AF/MF switch
Filter detail
Filter detail	–	67 mm front thread and rear filter holder; Canon specifies a single rear filter no thicker than 0.2 mm and recommends removing the holder when unused to avoid possible ghosting
Weather resistance
Weather resistance	Dust and moisture resistant construction with rubber mount seal; front-element fluorine coating	Dust and moisture resistant construction with mount rubber seal
Dimensions detail
Dimensions detail	Approximately 89.2 mm maximum diameter × 130.3 mm length	Approximately 76.5 mm maximum diameter × 99.3 mm length
Weight detail
Weight detail	Approximately 935 g lens	Approximately 519 g lens
Lens hood
Lens hood	ET-88B hood included (Canon UK store)	EW-73H hood included
In the box
In the box	Lens, ET-88B hood, LP1319 lens case, E-82 II front cap and RF dust cap (Canon UK store)	Lens, E-67 II front cap, RF dust cap, EW-73H hood, LP1219 case, rear filter holder and user manual
Release detail
Release detail	January 2023 marketed month in Canon Camera Museum	April 2025 marketed month in Canon Camera Museum