Canon RF 28–70mm F2 L USM vs Canon RF 45mm F1.2 STM

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RF 28–70mm F2 L USM compared with RF 45mm F1.2 STM

	CanonRF 28–70mm F2 L USM	CanonRF 45mm F1.2 STM
Overview
Released
Released	December 2018	November 2025
Optics
Lens type
Lens type	Zoom	Prime
Focal length
Focal length	28–70 mm	45 mm
Maximum aperture
Maximum aperture	f/2	f/1.2
Minimum aperture
Minimum aperture	f/22	f/16
Optical construction
Optical construction	Nineteen elements in thirteen groups	Nine elements in seven groups
Special elements
Special elements	Two ground and polished aspherical elements, two glass-moulded aspherical elements, one Super UD and two UD elements	One plastic-moulded aspherical element (Canon USA)
Coatings
Coatings	SWC and ASC coatings; front and rearmost surface fluorine coatings	Super Spectra coating
Aperture detail
Aperture detail	–	f/1.2–16
Diaphragm
Diaphragm	Nine aperture blades	Nine aperture blades
Angle of view
Angle of view	75°–34° 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 extenders not compatible
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.39 m	0.45 m
Maximum magnification
Maximum magnification	0.18×	0.13×
Optical stabilisation
Optical stabilisation	No	No
Autofocus detail
Autofocus detail	USM autofocus with full-time manual override; ring-type USM drive (OpticalLimits)	Gear-type STM autofocus with magnetic focus-position detection; full-time electronic manual focus
Focus distance detail
Focus distance detail	Minimum focus 0.39 m	Minimum focusing distance 0.45 m; Canon does not separately specify AF/MF distances
Magnification detail
Magnification detail	Maximum 0.18×	–
Stabilisation detail
Stabilisation detail	No optical stabiliser (OpticalLimits and Digital Camera World)	No optical image stabilisation (Canon USA)
Design
Dust and moisture resistant
Dust and moisture resistant	Yes	No
Filter diameter
Filter diameter	95 mm	67 mm
Maximum diameter
Maximum diameter	103.8 mm	78 mm
Length
Length	139.8 mm	75 mm
Weight
Weight	1,430 g	346 g (better)
Controls
Controls	Separate zoom, electronic manual-focus and customisable lens control rings	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
Zoom design
Zoom design	Barrel extends towards the long end of the zoom range (OpticalLimits)	–
Weather resistance
Weather resistance	Dust and moisture resistant construction with front and rear fluorine coatings	No dust or weather resistant construction (Canon USA)
Dimensions detail
Dimensions detail	103.8 mm maximum diameter × 139.8 mm length with barrel retracted	Approximately 78 mm maximum diameter × 75 mm length
Weight detail
Weight detail	Approximately 1430 g lens	Approximately 346 g lens
Lens hood
Lens hood	EW-103 hood included	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, E-95 front cap, RF dust cap, EW-103 hood, LP1424 lens case and user manual	Front and rear lens caps (Amateur Photographer); hood not included
Release detail
Release detail	December 2018 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