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Canon RF 24–105mm F4L IS USM vs Canon RF 28–70mm F2.8 IS STM

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

Better figure, where one is clearly better

CanonRF 24–105mm F4L IS USMCanonRF 28–70mm F2.8 IS STM
Overview
ReleasedOctober 2018September 2024
Optics
Lens typeZoomZoom
Focal length24–105 mm28–70 mm
Maximum aperturef/4f/2.8
Minimum aperturef/22f/22
Optical construction18 elements in 14 groups15 elements in 12 groups
Special elementsThree glass-moulded aspherical elements and one UD elementTwo UD elements and two GMo aspherical elements
CoatingsASC and Super Spectra anti-reflection coatings; fluorine coatings on front and rearmost surfacesSuper Spectra; no fluorine coating, per UK maker specification
DiaphragmNine blades with circular apertureNine blades
Angle of viewFull-frame horizontal 74°–19°20′, vertical 53°–13° and diagonal 84°–23°20′–
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EOS R cameras; full-frame image circle. RF optical model distinct from EF24–105mmF4L generations and RF24–105mmF4–7.1STMFull-frame image circle, Canon RF mount; incompatible with EF DSLRs and EOS M bodies. Canon RF extenders not compatible
Teleconverter supportCanon RF extenders not compatible; UK maker also lists EF12 II/EF25 II extension tubes incompatible–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.45 m0.24 m (manual focus)
Maximum magnification0.24×0.24×
Optical stabilisationYesYes
Autofocus detailNano USM autofocus; electronic manual focusLead-screw STM with magnetic motor-speed sensor and feedback control, electronic manual focus
Focus distance detailMaker minimum focus distance 0.45 m; published AF/MF distinction absent and omittedMinimum focus at 28 mm is 0.27 m in AF or 0.24 m in MF; main figure retains the closer MF mode
Magnification detailMaker maximum magnification 0.24×; no unpublished AF/MF distinction inferredMaximum 0.24× at 70 mm in either AF or MF
Stabilisation detailLens optical IS rated five stops, CIPA with EOS R at105mm in Canon Camera Museum; OpticalLimits obtained about3.5–4stops in its electronic-shutter test, a separate measured resultLens optical IS rated 5.5 central stops at 70 mm with EOS R8, yaw/pitch under CIPA2024. Japan current feature page rates coordinated EOS R6 Mark II body/lens IS 7.5 central and 7.0 peripheral stops, yaw/pitch/roll; original press release gives the same coordinated rating with EOS R1
Video featuresNano USM supports smooth movie autofocus; maker describes combined lens optical and camera electronic video IS separately from lens-only ratingSmooth STM movie focusing; compatible camera breathing correction is digital. Cameralabs observes uncorrected focus breathing, more visible at 28 mm
Design
Dust and moisture resistantYesYes
Filter diameter77 mm67 mm
Maximum diameter83.5 mm76.5 mm
Length107.3 mm92.2 mm
Weight700 g490 g
ControlsZoom and focus rings, customisable lens control ring and zoom transport lock; OpticalLimits found no creeping during its testShared focus/control ring with AF/control/MF selector; separate zoom ring and stabilisation switch
Zoom designExtending zoom barrel; maker physical dimensions measured retractedRetractable barrel must be extended to 28 mm before shooting; length 92.2 mm stored, 112.4 mm at 28 mm and 138.9 mm at 70 mm, per Japan maker table
Filter detail77 mm front filter thread–
Weather resistanceDust and moisture resistant construction, requiring attachment to a camera; cannot completely prevent dust/water ingress and is not waterproofUK maker states dust/moisture resistance, including rubber mount seal; no waterproof rating published
Dimensions detailApproximately83.5mm maximum diameter ×107.3mm length in retracted stateMaximum diameter 76.5 mm; 92.2 mm length when retracted
Weight detailApproximately700g lensUK current specification and store state 490 g; Japan current table, Camera Museum and original press release state 495 g. Main value follows UK specification; no undocumented regional variant inferred
Lens hoodEW-83NEW-73D, sold separately
In the boxUK maker store lists lens, E-77 II cap, Lens Dust Cap RF, EW-83N hood, LP1319 case and user manualUK maker store lists lens, E-67 II front cap, rear dust cap and user manual
Release detailCanon Japan FAQ gives first sale 25 October 2018, consistent with Camera Museum marketed month; no exact UK on-sale day inferred. Maker Japan offers a control-ring de-click service, so the launch DCW statement that it cannot be de-clicked is not treated as current service availability. Co-sold RF standard zooms are alternatives, not inferred successor linksSeptember 2024 marketed month in Canon Camera Museum; original maker release specifies 27 September in Japan. No exact worldwide first-sale day inferred; no successor link inferred across co-sold standard zooms

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