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Canon RF 15–35mm F2.8 L IS 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 15–35mm F2.8 L IS USMCanonRF 75–300mm F4–5.6
Overview
ReleasedSeptember 2019May 2025
Optics
Lens typeZoomZoom
Focal length15–35 mm75–300 mm
Maximum aperturef/2.8f/4–5.6
Minimum aperturef/22f/32–45
Optical constructionSixteen elements in twelve groupsThirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 III
Coatings–Super 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
Special elementsThree glass-moulded aspherical elements and UD elements; SWC and ASC coatings; fluorine coatings on the front and rear elements–
DiaphragmNine blades with circular apertureSeven blades
Angle of view–Full-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 cameras; RF extenders not compatibleCanon 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 distance0.28 m1.5 m
Maximum magnification0.21×0.25×
Optical stabilisationYesNo
Autofocus detailNano USM motor; electronic manual focusingDC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detailMinimum focus 0.28 m1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)
Magnification detailMaximum 0.21× at 35 mm0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detailOptical IS rated five stops with EOS R at 35 mm under CIPA standardsNo lens optical stabilisation
Video features–Substantial focus breathing in The-Digital-Picture's test
Design
Dust and moisture resistantYes–
Filter diameter82 mm58 mm
Maximum diameter88.5 mm71.2 mm
Length126.8 mm146.1 mm
Weight840 g507 g
ControlsZoom, electronic manual-focus and customisable control rings; AF/MF and stabiliser on/off switchesManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom designBarrel extends as the lens zooms from 35 mm towards 15 mm (Cameralabs)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 water resistant construction; Canon states this cannot completely prevent dust or droplets enteringCanon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealing
Dimensions detailApproximately 88.5 mm maximum diameter × 126.8 mm length, retracted71.2 mm maximum diameter × 146.1 mm retracted length
Weight detailApproximately 840 g lensApproximately 507 g lens
Lens hoodEW-88F petal hood includedOptional ET-60 hood, not included
In the boxLens, E-82 II front cap, RF dust cap, EW-88F hood and LP1222 caseLens, E-58 II lens cap, RF dust cap and user manual
Release detailSeptember 2019 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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