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Canon RF 45mm F1.2 STM vs Canon RF 600mm F4L IS USM

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

Better figure, where one is clearly better

CanonRF 45mm F1.2 STMCanonRF 600mm F4L IS USM
Overview
ReleasedNovember 2025July 2021
Optics
Lens typePrimePrime
Focal length45 mm600 mm
Maximum aperturef/1.2f/4
Minimum aperturef/16f/32
Optical constructionNine elements in seven groupsSeventeen elements in thirteen groups
Special elementsOne plastic-moulded aspherical element (Canon USA)Two fluorite elements and one Super UD element
CoatingsSuper Spectra coatingSuper Spectra and ASC; fluorine coatings on front and rear elements
Aperture detailf/1.2–16Maximum f/4; minimum f/32
DiaphragmNine aperture bladesNine blades
Angle of view43°35′ horizontal, 29°50′ vertical and 51°20′ diagonal on full frameFull-frame diagonal 4°10′
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EOS R cameras; full-frame image circleCanon RF mount for full-frame and APS-C EOS R cameras; 960 mm equivalent field of view on Canon APS-C
Teleconverter supportCanon RF extenders not compatibleCompatible with RF 1.4× and RF 2× extenders
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.45 m4.2 m
Maximum magnification0.13×0.15×
Optical stabilisationNoYes
Autofocus detailGear-type STM autofocus with magnetic focus-position detection; full-time electronic manual focusRing-type USM with Power Doubled Focus Drive on compatible cameras; full-time manual override
Focus distance detailMinimum focusing distance 0.45 m; Canon does not separately specify AF/MF distances4.2 m minimum focus; two stored focus presets and variable-speed manual focusing
Magnification detail–0.15× maximum magnification
Stabilisation detailNo optical image stabilisation (Canon USA)Canon rates optical IS at 5.5 stops with EOS R or EOS R5 under CIPA yaw/pitch conditions; modes 1, 2 and 3
Video features–Aperture control in 1/8-stop increments; power-focus mode for controlled focus transitions
Design
Dust and moisture resistantNoYes
Filter diameter67 mm52 mm
Maximum diameter78 mm168 mm
Length75 mm472 mm
Weight346 g3,090 g
ControlsSeparate focus and clickable control rings; AF/MF switch; no iris ring or lens function button (Canon USA)Focus ring, playback ring, focus-preset controls and lens-function buttons; no custom control ring (Cameralabs)
Filter detail67 mm front screw-in filter thread52 mm drop-in screw-type filter holder 52 (WIII), supplied with a clear Protect filter; optional circular polariser and gelatin holder
Weather resistanceNo dust or weather resistant construction (Canon USA)Dust- and moisture-resistant construction with heat-reflective white paint
Dimensions detailApproximately 78 mm maximum diameter × 75 mm length168 mm maximum diameter × 472 mm length
Weight detailApproximately 346 g lensApproximately 3,090 g lens
Tripod mount–Rotating built-in foot with 1/4-inch and 3/8-inch threads; no Arca-Swiss dovetail (Cameralabs)
Lens hoodOptional ES-73B hood and LP1116 case; E-67 II front cap and Lens Dust Cap RF listed by CanonET-160 (WIII) included; shorter ET-160B optional
In the boxFront and rear lens caps (Amateur Photographer); hood not includedLens, RF dust cap, drop-in screw-type filter holder 52 (WIII) with 52 mm Protect filter, E-185C soft cap, ET-160 (WIII) hood, LS600 soft case, Lens Wide Strap B and user manual
Release detailCanon 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 inferredJuly 2021 Japanese first release confirmed retrospectively by Canon's March 2022 announcement and Camera Museum

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