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Canon RF 28–70mm F2 L USM vs Canon RF 75–300mm F4–5.6

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

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CanonRF 28–70mm F2 L USMCanonRF 75–300mm F4–5.6
Overview
ReleasedDecember 2018May 2025
Optics
Lens typeZoomZoom
Focal length28–70 mm75–300 mm
Maximum aperturef/2f/4–5.6
Minimum aperturef/22f/32–45
Optical constructionNineteen elements in thirteen groupsThirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 III
Special elementsTwo ground and polished aspherical elements, two glass-moulded aspherical elements, one Super UD and two UD elements–
CoatingsSWC and ASC coatings; front and rearmost surface fluorine coatingsSuper Spectra; no fluorine coating
Aperture detail–Maximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectively
DiaphragmNine aperture bladesSeven blades
Angle of view75°–34° diagonalFull-frame diagonal 32°11′–8°15′; horizontal 27°–6°50′; vertical 18°11′–4°35′
Mount and compatibility
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon RF mount for full-frame and APS-C EOS R camerasCanon RF mount for full-frame and APS-C EOS R cameras; 120–480 mm equivalent field of view on Canon APS-C
Teleconverter support–Not compatible with RF extenders (The-Digital-Picture)
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.39 m1.5 m
Maximum magnification0.18×0.25×
Optical stabilisationNoNo
Autofocus detailUSM autofocus with full-time manual override; ring-type USM drive (OpticalLimits)DC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detailMinimum focus 0.39 m1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)
Magnification detailMaximum 0.18×0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detailNo optical stabiliser (OpticalLimits and Digital Camera World)No lens optical stabilisation
Video features–Substantial focus breathing in The-Digital-Picture's test
Design
Dust and moisture resistantYes–
Filter diameter95 mm58 mm
Maximum diameter103.8 mm71.2 mm
Length139.8 mm146.1 mm
Weight1,430 g507 g
ControlsSeparate zoom, electronic manual-focus and customisable lens control ringsManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom designBarrel extends towards the long end of the zoom range (OpticalLimits)Extending zoom barrel; further extension and front rotation during focusing (Digital Camera World)
Filter detail–58 mm front thread rotates during focusing
Weather resistanceDust and moisture resistant construction with front and rear fluorine coatingsCanon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealing
Dimensions detail103.8 mm maximum diameter × 139.8 mm length with barrel retracted71.2 mm maximum diameter × 146.1 mm retracted length
Weight detailApproximately 1430 g lensApproximately 507 g lens
Lens hoodEW-103 hood includedOptional ET-60 hood, not included
In the boxLens, E-95 front cap, RF dust cap, EW-103 hood, LP1424 lens case and user manualLens, E-58 II lens cap, RF dust cap and user manual
Release detailDecember 2018 marketed month in Canon Camera MuseumMay 2025 release confirmed retrospectively by Canon's February 2026 press release and Canon Camera Museum

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