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Canon RF 600mm F11 IS STM vs Canon RF 75–300mm F4–5.6

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

Better figure, where one is clearly better

CanonRF 600mm F11 IS STMCanonRF 75–300mm F4–5.6
Overview
ReleasedJuly 2020May 2025
Optics
Lens typePrimeZoom
Focal length600 mm75–300 mm
Maximum aperturef/11f/4–5.6
Minimum aperturef/11f/32–45
Optical constructionTen elements in seven groupsThirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 III
Coatings–Super Spectra; no fluorine coating
Special elementsGapless dual-layer diffractive optical element–
Aperture detailFixed f/11 aperture; cannot be stopped downMaximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectively
DiaphragmNo aperture bladesSeven blades
Angle of view–Full-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 supportCompatible with RF extenders; 840 mm at f/16 with RF 1.4× or 1200 mm at f/22 with RF 2× (Cameralabs and Dustin Abbott). Autofocus performance depends on camera and light levelsNot compatible with RF extenders (The-Digital-Picture)
Focus and stabilisation
AutofocusYesYes
Minimum focus distance4.5 m1.5 m
Maximum magnification0.14×0.25×
Optical stabilisationYesNo
Autofocus detailLead-screw STM autofocus; Canon Camera Museum states a focus area of 40% horizontal × 60% vertical for the original supported EOS R bodiesDC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detailMinimum focus 4.5 m; full-range or 12 m–infinity focus limiter (Cameralabs and Dustin Abbott)1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)
Magnification detailMaximum 0.14×0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detailUp to five stops optical stabilisation under CIPA testing with EOS RNo lens optical stabilisation
Video features–Substantial focus breathing in The-Digital-Picture's test
Design
Dust and moisture resistantNo–
Filter diameter82 mm58 mm
Maximum diameter93 mm71.2 mm
Length199.5 mm146.1 mm
Weight930 g507 g
ControlsSeparate manual focus and customisable control rings; focus limiter, AF/MF and stabiliser switchesManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom designPrime lens with a retracting storage barrel; extend and lock the barrel before shootingExtending zoom barrel; further extension and front rotation during focusing (Digital Camera World)
Filter detail–58 mm front thread rotates during focusing
Weather resistanceNo dust or moisture sealing, including no rubber mount seal (Cameralabs)Canon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealing
Dimensions detail93 mm maximum diameter; 199.5 mm retracted length or 269.5 mm when extended for shooting71.2 mm maximum diameter × 146.1 mm retracted length
Weight detailApproximately 930 g lensApproximately 507 g lens
Tripod mountBuilt-in tripod mounting thread; no rotating collar (Cameralabs)–
Lens hoodET-88B hood sold separately (Dustin Abbott)Optional ET-60 hood, not included
In the boxLens, E-82II cap, RF dust cap and user manual kitLens, E-58 II lens cap, RF dust cap and user manual
Release detailJuly 2020 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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