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Canon RF 75–300mm F4–5.6 vs Canon RF 85mm F1.2 L USM

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

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CanonRF 75–300mm F4–5.6CanonRF 85mm F1.2 L USM
Overview
ReleasedMay 2025June 2019
Optics
Lens typeZoomPrime
Focal length75–300 mm85 mm
Maximum aperturef/4–5.6f/1.2
Minimum aperturef/32–45f/16
Optical constructionThirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 IIIThirteen elements in nine groups
Special elements–BR optics, UD and ground aspherical optics; ASC coating; front and rear fluorine coatings
CoatingsSuper Spectra; no fluorine coating–
Aperture detailMaximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectively–
DiaphragmSeven bladesNine blades with circular aperture
Angle of viewFull-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; 120–480 mm equivalent field of view on Canon APS-CCanon RF mount for full-frame and APS-C EOS R cameras; extenders and EF12 II or EF25 II extension tubes not compatible
Teleconverter supportNot compatible with RF extenders (The-Digital-Picture)–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance1.5 m0.85 m
Maximum magnification0.25×0.12×
Optical stabilisationNoNo
Autofocus detailDC motor autofocus; no full-time manual focus override (Digital Camera World)Ring-type USM autofocus with electronic manual focusing and full-time manual override (Digital Camera World)
Focus distance detail1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)Minimum focus 0.85 m; internal focusing and focus limiter with 1.5 m to infinity setting (Digital Camera World)
Magnification detail0.06× at 75 mm and 0.25× at 300 mmMaximum 0.12×
Stabilisation detailNo lens optical stabilisationNo optical stabiliser
Video featuresSubstantial focus breathing in The-Digital-Picture's test–
Design
Dust and moisture resistant–Yes
Filter diameter58 mm82 mm
Maximum diameter71.2 mm103.2 mm
Length146.1 mm117.3 mm
Weight507 g1,195 g
ControlsManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)Electronic manual-focus and customisable lens control rings; AF/MF and focus limiter switches (Digital Camera World)
Zoom designExtending zoom barrel; further extension and front rotation during focusing (Digital Camera World)–
Filter detail58 mm front thread rotates during focusing–
Weather resistanceCanon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealingWeather-sealed construction with front and rear fluorine coatings
Dimensions detail71.2 mm maximum diameter × 146.1 mm retracted lengthApproximately 103.2 mm maximum diameter × 117.3 mm length
Weight detailApproximately 507 g lensApproximately 1195 g lens
Lens hoodOptional ET-60 hood, not includedET-89 hood included
In the boxLens, E-58 II lens cap, RF dust cap and user manualLens, E-82 II front cap, RF dust cap, ET-89 hood, LP1424 soft pouch and user manual
Release detailMay 2025 release confirmed retrospectively by Canon's February 2026 press release and Canon Camera MuseumJune 2019 marketed month in Canon Camera Museum

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