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Canon RF 24–105mm F4L IS USM vs Canon RF 28–70mm F2 L USM

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 L USM
Overview
ReleasedOctober 2018December 2018
Optics
Lens typeZoomZoom
Focal length24–105 mm28–70 mm
Maximum aperturef/4f/2
Minimum aperturef/22f/22
Optical construction18 elements in 14 groupsNineteen elements in thirteen groups
Special elementsThree glass-moulded aspherical elements and one UD elementTwo ground and polished aspherical elements, two glass-moulded aspherical elements, one Super UD and two UD elements
CoatingsASC and Super Spectra anti-reflection coatings; fluorine coatings on front and rearmost surfacesSWC and ASC coatings; front and rearmost surface fluorine coatings
DiaphragmNine blades with circular apertureNine aperture blades
Angle of viewFull-frame horizontal 74°–19°20′, vertical 53°–13° and diagonal 84°–23°20′75°–34° diagonal
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 RF24–105mmF4–7.1STMCanon RF mount for full-frame and APS-C EOS R cameras
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 m0.39 m
Maximum magnification0.24×0.18×
Optical stabilisationYesNo
Autofocus detailNano USM autofocus; electronic manual focusUSM autofocus with full-time manual override; ring-type USM drive (OpticalLimits)
Focus distance detailMaker minimum focus distance 0.45 m; published AF/MF distinction absent and omittedMinimum focus 0.39 m
Magnification detailMaker maximum magnification 0.24×; no unpublished AF/MF distinction inferredMaximum 0.18×
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 resultNo optical stabiliser (OpticalLimits and Digital Camera World)
Video featuresNano USM supports smooth movie autofocus; maker describes combined lens optical and camera electronic video IS separately from lens-only rating–
Design
Dust and moisture resistantYesYes
Filter diameter77 mm95 mm
Maximum diameter83.5 mm103.8 mm
Length107.3 mm139.8 mm
Weight700 g1,430 g
ControlsZoom and focus rings, customisable lens control ring and zoom transport lock; OpticalLimits found no creeping during its testSeparate zoom, electronic manual-focus and customisable lens control rings
Zoom designExtending zoom barrel; maker physical dimensions measured retractedBarrel extends towards the long end of the zoom range (OpticalLimits)
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 waterproofDust and moisture resistant construction with front and rear fluorine coatings
Dimensions detailApproximately83.5mm maximum diameter ×107.3mm length in retracted state103.8 mm maximum diameter × 139.8 mm length with barrel retracted
Weight detailApproximately700g lensApproximately 1430 g lens
Lens hoodEW-83NEW-103 hood included
In the boxUK maker store lists lens, E-77 II cap, Lens Dust Cap RF, EW-83N hood, LP1319 case and user manualLens, E-95 front cap, RF dust cap, EW-103 hood, LP1424 lens case 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 linksDecember 2018 marketed month in Canon Camera Museum

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