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Canon RF 20mm F1.4 L VCM 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 20mm F1.4 L VCMCanonRF 75–300mm F4–5.6
Overview
ReleasedApril 2025May 2025
Optics
Lens typePrimeZoom
Focal length20 mm75–300 mm
Maximum aperturef/1.4f/4–5.6
Minimum aperturef/16f/32–45
Optical constructionFifteen elements in eleven 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
Aperture detail–Maximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectively
Special elementsOne Super UD, two UD, one BR and two glass-moulded aspherical elements; ASC, SWC and Super Spectra coatings; front fluorine coating–
DiaphragmEleven blades with circular apertureSeven 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 cameras; RF extenders not compatible. Iris ring provides movie aperture control; Canon lists EOS R, RP, Ra, R3, R5, R6, R6 Mark II, R7, R8, R10, R50, R100 and R5 C as unable to set still-photo aperture with this ring even with their latest firmwareCanon RF mount for full-frame and APS-C EOS R cameras; 120–480 mm equivalent field of view on Canon APS-C
Teleconverter support–Not compatible with RF extenders (The-Digital-Picture)
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.2 m1.5 m
Maximum magnification0.19×0.25×
Optical stabilisationNoNo
Autofocus detailRear focusing system driven by a VCM motorDC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detailMinimum focus 0.2 m1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)
Magnification detailMaximum 0.19×0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detailNo optical stabiliser; Canon rates EOS R1 in-body stabilisation at 8 stops centrally and 5 stops in the corners under CIPA-2024 testingNo lens optical stabilisation
Video features–Substantial focus breathing in The-Digital-Picture's test
Design
Dust and moisture resistantYes–
Filter diameter67 mm58 mm
Maximum diameter76.5 mm71.2 mm
Length99.3 mm146.1 mm
Weight519 g507 g
ControlsElectronic manual-focus, customisable control and smooth-action iris rings; iris Auto-position lock; customisable lens function button; AF/MF switchManual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom design–Extending zoom barrel; further extension and front rotation during focusing (Digital Camera World)
Filter detail67 mm front thread and rear filter holder; Canon specifies a single rear filter no thicker than 0.2 mm and recommends removing the holder when unused to avoid possible ghosting58 mm front thread rotates during focusing
Weather resistanceDust and moisture resistant construction with mount rubber sealCanon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealing
Dimensions detailApproximately 76.5 mm maximum diameter × 99.3 mm length71.2 mm maximum diameter × 146.1 mm retracted length
Weight detailApproximately 519 g lensApproximately 507 g lens
Lens hoodEW-73H hood includedOptional ET-60 hood, not included
In the boxLens, E-67 II front cap, RF dust cap, EW-73H hood, LP1219 case, rear filter holder and user manualLens, E-58 II lens cap, RF dust cap and user manual
Release detailApril 2025 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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