Canon RF 135mm F1.8 L IS USM vs Canon RF 45mm F1.2 STM

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RF 135mm F1.8 L IS USM compared with RF 45mm F1.2 STM

	CanonRF 135mm F1.8 L IS USM	CanonRF 45mm F1.2 STM
Overview
Released
Released	January 2023	November 2025
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	135 mm	45 mm
Maximum aperture
Maximum aperture	f/1.8	f/1.2
Minimum aperture
Minimum aperture	f/22	f/16
Optical construction
Optical construction	Seventeen elements in twelve groups	Nine elements in seven groups
Special elements
Special elements	Three UD elements	One plastic-moulded aspherical element (Canon USA)
Coatings
Coatings	ASC and Super Spectra coatings; front-element fluorine coating	Super Spectra coating
Aperture detail
Aperture detail	–	f/1.2–16
Diaphragm
Diaphragm	Nine blades with circular aperture	Nine aperture blades
Angle of view
Angle of view	Approximately 18° diagonal	43°35′ horizontal, 29°50′ vertical and 51°20′ diagonal on full frame
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 EOS R cameras; full-frame image circle
Teleconverter support
Teleconverter support	Canon RF 1.4× and 2× extenders not compatible	Canon RF extenders not compatible
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.7 m	0.45 m
Maximum magnification
Maximum magnification	0.26×	0.13×
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	Gear-type STM autofocus with magnetic focus-position detection; full-time electronic manual focus
Focus distance detail
Focus distance detail	Minimum focus 0.70 m; no distance limiter switch	Minimum focusing distance 0.45 m; Canon does not separately specify AF/MF distances
Magnification detail
Magnification detail	Maximum 0.26×; approximately 135 × 91 mm field of view at minimum focus	–
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 image stabilisation (Canon USA)
Video features
Video features	Focus breathing correction available on compatible cameras	–
Design
Dust and moisture resistant
Dust and moisture resistant	Yes	No
Filter diameter
Filter diameter	82 mm	67 mm
Maximum diameter
Maximum diameter	89.2 mm	78 mm
Length
Length	130.3 mm	75 mm
Weight
Weight	935 g	346 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	Separate focus and clickable control rings; AF/MF switch; no iris ring or lens function button (Canon USA)
Filter detail
Filter detail	–	67 mm front screw-in filter thread
Weather resistance
Weather resistance	Dust and moisture resistant construction with rubber mount seal; front-element fluorine coating	No dust or weather resistant construction (Canon USA)
Dimensions detail
Dimensions detail	Approximately 89.2 mm maximum diameter × 130.3 mm length	Approximately 78 mm maximum diameter × 75 mm length
Weight detail
Weight detail	Approximately 935 g lens	Approximately 346 g lens
Lens hood
Lens hood	ET-88B hood included (Canon UK store)	Optional ES-73B hood and LP1116 case; E-67 II front cap and Lens Dust Cap RF listed by Canon
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)	Front and rear lens caps (Amateur Photographer); hood not included
Release detail
Release detail	January 2023 marketed month in Canon Camera Museum	Canon Japan's 14 November 2025 notice confirms first sale on 28 November 2025; Photography Blog instead reports availability from 20 November without a matching regional maker day, so no UK date is inferred