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Canon RF 75–300mm F4–5.6 vs Canon RF 85mm F1.4L VCM

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

Better figure, where one is clearly better

CanonRF 75–300mm F4–5.6CanonRF 85mm F1.4L VCM
Overview
ReleasedMay 2025September 2025
Optics
Lens typeZoomPrime
Focal length75–300 mm85 mm
Maximum aperturef/4–5.6f/1.4
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 III14 elements in 10 groups
Special elements–One UD and one glass-moulded aspherical element
CoatingsSuper Spectra; no fluorine coatingASC and Super Spectra; fluorine coating on the front element
Aperture detailMaximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectivelyf/1.4–16 with stepless iris ring; no click-stop option (Amateur Photographer)
DiaphragmSeven blades11 circular aperture blades
Angle of viewFull-frame diagonal 32°11′–8°15′; horizontal 27°–6°50′; vertical 18°11′–4°35′24° horizontal, 16° vertical and 28°30′ diagonal on full frame
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 EOS R cameras; full-frame image circle; stills iris-ring support is body/firmware dependent
Teleconverter supportNot compatible with RF extenders (The-Digital-Picture)Canon RF extenders not compatible
Focus and stabilisation
AutofocusYesYes
Minimum focus distance1.5 m0.75 m
Maximum magnification0.25×0.12×
Optical stabilisationNoNo
Autofocus detailDC motor autofocus; no full-time manual focus override (Digital Camera World)Voice Coil Motor autofocus; electronic manual focus; maker notes movement/noise in unpowered internal VCM components is normal
Focus distance detail1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)–
Magnification detail0.06× at 75 mm and 0.25× at 300 mm–
Stabilisation detailNo lens optical stabilisationNo lens optical IS; maker separately lists camera IBIS CIPA-2024 performance of eight stops at the centre and seven at the corners under its camera/test conditions
Video featuresSubstantial focus breathing in The-Digital-Picture's testOptically suppressed focus breathing and stepless iris control; UK maker footnote excludes stills iris-ring operation on EOS R/RP/Ra/R3/R5/R6/R6 Mark II/R7/R8/R10/R50/R100/R5 C even with current firmware
Design
Dust and moisture resistant–Yes
Filter diameter58 mm67 mm
Maximum diameter71.2 mm76.5 mm
Length146.1 mm99.3 mm
Weight507 g636 g
ControlsManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)Customisable control ring, focus ring, iris ring with Auto-position lock, function button and AF/MF switch (Amateur Photographer)
Zoom designExtending zoom barrel; further extension and front rotation during focusing (Digital Camera World)–
Filter detail58 mm front thread rotates during focusing67 mm front screw-in filter thread; compatible Canon 67 mm Protect and PL-C B circular polarising filters
Weather resistanceCanon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealingDust and moisture resistant with mount gasket; Canon states protection requires attachment to a camera and cannot prevent all dust or water ingress; no waterproof/IP rating inferred
Dimensions detail71.2 mm maximum diameter × 146.1 mm retracted lengthApproximately 76.5 mm maximum diameter × 99.3 mm length
Weight detailApproximately 507 g lensApproximately 636 g lens
Lens hoodOptional ET-60 hood, not includedET-73C; maker lists E-67 II cap, Lens Dust Cap RF and LP1219 pouch as accessories
In the boxLens, E-58 II lens cap, RF dust cap and user manual–
Release detailMay 2025 release confirmed retrospectively by Canon's February 2026 press release and Canon Camera MuseumCanon Japan specifies first sale on 27 September 2025; no UK first-sale day inferred

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