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Canon RF 135mm F1.8 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 135mm F1.8 L IS USMCanonRF 75–300mm F4–5.6
Overview
ReleasedJanuary 2023May 2025
Optics
Lens typePrimeZoom
Focal length135 mm75–300 mm
Maximum aperturef/1.8f/4–5.6
Minimum aperturef/22f/32–45
Optical constructionSeventeen elements in twelve groupsThirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 III
Special elementsThree UD elements–
CoatingsASC and Super Spectra coatings; front-element fluorine coatingSuper 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 blades with circular apertureSeven blades
Angle of viewApproximately 18° 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 supportCanon RF 1.4× and 2× extenders not compatibleNot compatible with RF extenders (The-Digital-Picture)
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.7 m1.5 m
Maximum magnification0.26×0.25×
Optical stabilisationYesNo
Autofocus detailNano USM; full-time manual focusing supported in One Shot AF and Servo AF on compatible EOS R-series camerasDC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detailMinimum focus 0.70 m; no distance limiter switch1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)
Magnification detailMaximum 0.26×; approximately 135 × 91 mm field of view at minimum focus0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detailUp to 5.5 stops optical IS with EOS R; up to 8 stops coordinated with EOS R3 IBIS, under CIPA yaw/pitch testingNo lens optical stabilisation
Video featuresFocus breathing correction available on compatible camerasSubstantial focus breathing in The-Digital-Picture's test
Design
Dust and moisture resistantYes–
Filter diameter82 mm58 mm
Maximum diameter89.2 mm71.2 mm
Length130.3 mm146.1 mm
Weight935 g507 g
ControlsSeparate electronic manual-focus and customisable control rings; two customisable lens function buttons default to AF stop; AF/MF and stabiliser switchesManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom design–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 rubber mount seal; front-element fluorine coatingCanon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealing
Dimensions detailApproximately 89.2 mm maximum diameter × 130.3 mm length71.2 mm maximum diameter × 146.1 mm retracted length
Weight detailApproximately 935 g lensApproximately 507 g lens
Lens hoodET-88B hood included (Canon UK store)Optional ET-60 hood, not included
In the boxLens, ET-88B hood, LP1319 lens case, E-82 II front cap and RF dust cap (Canon UK store)Lens, E-58 II lens cap, RF dust cap and user manual
Release detailJanuary 2023 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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