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Canon RF 24–70mm F2.8L IS USM vs Canon RF 45mm F1.2 STM

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

Better figure, where one is clearly better

CanonRF 24–70mm F2.8L IS USMCanonRF 45mm F1.2 STM
Overview
ReleasedSeptember 2019November 2025
Optics
Lens typeZoomPrime
Focal length24–70 mm45 mm
Maximum aperturef/2.8f/1.2
Minimum aperturef/22f/16
Optical construction21 elements in 15 groupsNine elements in seven groups
Special elementsThree glass-moulded aspherical elements and three UD elementsOne plastic-moulded aspherical element (Canon USA)
CoatingsASC anti-reflection coating and fluorine coatingSuper Spectra coating
Aperture detail–f/1.2–16
DiaphragmNine blades with circular apertureNine aperture blades
Angle of viewFull-frame horizontal 74°–29°, vertical 53°–19°30′ and diagonal 84°–34°43°35′ horizontal, 29°50′ vertical and 51°20′ diagonal on full frame
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EOS R cameras; full-frame image circle. RF optical model distinct from EF24–70mm F2.8L generations and RF28–70mm F2.8 IS STMCanon EOS R cameras; full-frame image circle
Teleconverter support–Canon RF extenders not compatible
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.21 m0.45 m
Maximum magnification0.3×0.13×
Optical stabilisationYesNo
Autofocus detailNano USM autofocus; electronic full-time manual focus. Maker rear-focusing design does not change lens length while focusingGear-type STM autofocus with magnetic focus-position detection; full-time electronic manual focus
Focus distance detailMaker minimum focus distance 0.21 m at 24 mm; Photography Blog reports 0.38 m at 70 mm. AF/MF mode distinction unpublished and omittedMinimum focusing distance 0.45 m; Canon does not separately specify AF/MF distances
Magnification detailMaker maximum magnification 0.30× at 32 mm; no unpublished AF/MF distinction inferred–
Stabilisation detailLens optical IS rated five stops under CIPA guidelines at 70 mm with EOS R; body stabilisation is separateNo optical image stabilisation (Canon USA)
Design
Dust and moisture resistantYesNo
Filter diameter82 mm67 mm
Maximum diameter88.5 mm78 mm
Length125.7 mm75 mm
Weight900 g346 g
ControlsZoom and focus rings, customisable lens control ring, AF/MF and IS switches; Japan maker offers a paid control-ring de-click serviceSeparate focus and clickable control rings; AF/MF switch; no iris ring or lens function button (Canon USA)
Zoom designExtending zoom barrel; dimensions measured retracted–
Filter detail82 mm front filter thread67 mm front screw-in filter thread
Weather resistanceDust and moisture resistant construction requires attachment to a camera; cannot completely prevent dust or water ingress and is not waterproofNo dust or weather resistant construction (Canon USA)
Dimensions detailApproximately 88.5 mm maximum diameter × 125.7 mm length, retractedApproximately 78 mm maximum diameter × 75 mm length
Weight detailApproximately 900 g lensApproximately 346 g lens
Lens hoodEW-88EOptional ES-73B hood and LP1116 case; E-67 II front cap and Lens Dust Cap RF listed by Canon
In the boxUK maker store lists lens, EW-88E hood, LP1222 case, Lens Dust Cap RF and E-82 II front capFront and rear lens caps (Amateur Photographer); hood not included
Release detailSeptember 2019 marketed month in Canon Camera Museum; original Japan maker announcement gives late September. Exact worldwide first retail day is not inferred. Co-sold standard zooms are alternatives, with no inferred successor linkCanon 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

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