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Canon RF 800mm F11 IS STM 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 800mm F11 IS STMCanonRF 85mm F1.4L VCM
Overview
ReleasedJuly 2020September 2025
Optics
Lens typePrimePrime
Focal length800 mm85 mm
Maximum aperturef/11f/1.4
Minimum aperturef/11f/16
Optical constructionEleven elements in eight groups14 elements in 10 groups
Special elementsGapless dual-layer diffractive optical elementOne UD and one glass-moulded aspherical element
Coatings–ASC and Super Spectra; fluorine coating on the front element
Aperture detailFixed f/11 aperture; cannot be stopped downf/1.4–16 with stepless iris ring; no click-stop option (Amateur Photographer)
DiaphragmNo aperture blades11 circular aperture blades
Angle of view2°35′ horizontal, 1°40′ vertical and 3°05′ diagonal on full frame24° 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; EOS R, Ra and RP require compatible firmwareCanon EOS R cameras; full-frame image circle; stills iris-ring support is body/firmware dependent
Teleconverter supportRF 1.4× gives 1120 mm at f/16 and 0.19× maximum magnification; RF 2× gives 1600 mm at f/22 and 0.28×. Canon lists autofocus and stabilisation as supported with both; performance depends on camera and light levelsCanon RF extenders not compatible
Focus and stabilisation
AutofocusYesYes
Minimum focus distance6 m0.75 m
Maximum magnification0.14×0.12×
Optical stabilisationYesNo
Autofocus detailLead-screw STM autofocus; Canon states approximately 40% horizontal × 60% vertical AF coverage in its original EOS R compatibility notesVoice Coil Motor autofocus; electronic manual focus; maker notes movement/noise in unpowered internal VCM components is normal
Focus distance detailMinimum focus 6 m; full-range or 20 m–infinity focus limiter (Cameralabs)–
Magnification detailMaximum 0.14× without an extender–
Stabilisation detailUp to four stops optical stabilisation under CIPA testing with EOS RNo 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 features–Optically 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 resistantNoYes
Filter diameter95 mm67 mm
Maximum diameter101.6 mm76.5 mm
Length281.8 mm99.3 mm
Weight1,260 g636 g
ControlsSeparate manual focus and customisable control rings; focus limiter, AF/MF and stabiliser switchesCustomisable control ring, focus ring, iris ring with Auto-position lock, function button and AF/MF switch (Amateur Photographer)
Filter detail–67 mm front screw-in filter thread; compatible Canon 67 mm Protect and PL-C B circular polarising filters
Zoom designPrime lens with a retracting storage barrel; extend and lock the barrel before shooting–
Weather resistanceNo dust or moisture resistance; no rubber mount seal (Cameralabs)Dust 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 detail101.6 mm maximum diameter; 281.8 mm retracted length or 351.8 mm when extended for shootingApproximately 76.5 mm maximum diameter × 99.3 mm length
Weight detailApproximately 1260 g lensApproximately 636 g lens
Tripod mountBuilt-in tripod mounting thread; no rotating collar (Cameralabs)–
Lens hoodOptional ET-101 hood; not includedET-73C; maker lists E-67 II cap, Lens Dust Cap RF and LP1219 pouch as accessories
In the boxLens, E-95 cap, RF dust cap and user manual kit–
Release detailJuly 2020 marketed month in Canon Camera MuseumCanon Japan specifies first sale on 27 September 2025; no UK first-sale day inferred

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