Canon EF 24–105mm f/4L IS II 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

EF 24–105mm f/4L IS II USM compared with RF 28–70mm F2.8 IS STM
CanonEF 24–105mm f/4L IS II USMCanonRF 28–70mm F2.8 IS STM
Overview
Released2016September 2024
Optics
Lens typeZoomZoom
Focal length24–105 mm28–70 mm
Maximum aperturef/4f/2.8
Minimum aperturef/22f/22
Optical constructionSeventeen elements in twelve groups15 elements in 12 groups
Special elementsFour aspherical elementsTwo UD elements and two GMo aspherical elements
CoatingsAir Sphere Coating; front and rear fluorine coating according to The Digital PictureSuper Spectra; no fluorine coating, per UK maker specification
DiaphragmTen blades with a circular apertureNine blades
Angle of view84°–23°20′ diagonal, 74°–19°20′ horizontal and 53°–13° vertical–
Mount and compatibility
MountsCanon EFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EF full-frame and APS-C DSLRs; EOS M cameras require an EF-EOS M mount adaptorFull-frame image circle, Canon RF mount; incompatible with EF DSLRs and EOS M bodies. Canon RF extenders not compatible
Teleconverter supportCanon's manual excludes extenders–
Adaptor supportEF12 II gives 0.60–0.50× at 24 mm and 0.41–0.12× at 105 mm; EF25 II is incompatible at 24 mm and gives 0.61–0.27× at 105 mm–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.45 m0.24 m (manual focus)
Maximum magnification0.24×0.24×
Optical stabilisationYesYes
Autofocus detailUSM autofocus with full-time manual focusing. Canon's manual specifies turning the ring with the shutter half-pressed after One Shot AFLead-screw STM with magnetic motor-speed sensor and feedback control, electronic manual focus
Focus distance detailInternal focusing according to The Digital Picture; Canon instructs users to finish zooming before focusingMinimum focus at 28 mm is 0.27 m in AF or 0.24 m in MF; main figure retains the closer MF mode
Magnification detail–Maximum 0.24× at 70 mm in either AF or MF
Stabilisation detailCanon claims four-stop optical stabilisation. The exact manual describes automatic adjustment for still subjects and panning, with correction perpendicular to the panning directionLens 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 features–Smooth 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
Length118 mm92.2 mm
Weight795 g490 g (better)
ControlsAF/MF and stabilisation switches, separate focus and zoom rings, distance window, infrared index and transport lock at 24 mmShared focus/control ring with AF/control/MF selector; separate zoom ring and stabilisation switch
Zoom designExtending barrel; zoom lock holds the shortest 24 mm positionRetractable 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
Weather resistanceCanon UK describes dust and moisture sealing; the manual identifies a rubber mount ring. The Digital Picture recommends a protective filter to complete front sealingUK maker states dust/moisture resistance, including rubber mount seal; no waterproof rating published
Dimensions detailMaximum diameter × retracted length; size and 795 g weight are lens-only. Caps add 24.2 mm to length according to Canon's manualMaximum diameter 76.5 mm; 92.2 mm length when retracted
Weight detail–UK 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-83M hood with release button; reversible for storageEW-73D, sold separately
In the boxLens, E-77 II front cap, Dust Lens Cap E, EW-83M hood, LP1219 case and manual according to Canon UKUK maker store lists lens, E-67 II front cap, rear dust cap and user manual
Release detailCanon Camera Museum's exact-model table records October 2016 marketing; its later RF 24–105mm page retrospectively says November 2016. The year is used because the maker gives conflicting months without explaining a regional differenceSeptember 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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