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

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 DS
Overview
ReleasedMay 2025December 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. Defocus Smoothing coating on two lens surfaces gradually lowers transmission towards their edges, softening out-of-focus highlight outlines without softening the focused subject; Digital Camera World reports about 1⅓ stops less light transmission at f/1.2 and a T2.2 transmission rating
Special elements–BR optical elements in one location, one UD element and one ground aspherical element; ASC and 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
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; 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 (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
Zoom designExtending zoom barrel; further extension and front rotation during focusing (Digital Camera World)–
Filter detail58 mm front thread rotates during focusing82 mm front filter thread
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 MuseumDecember 2019 marketed month in Canon Camera Museum

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