Request a product

Canon EF 50mm f/1.8 STM vs Canon RF 50mm F1.8 STM

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

Better figure, where one is clearly better

CanonEF 50mm f/1.8 STMCanonRF 50mm F1.8 STM
Overview
ReleasedMay 2015December 2020
Optics
Lens typePrimePrime
Focal length50 mm50 mm
Maximum aperturef/1.8f/1.8
Minimum aperturef/22f/22
Optical constructionSix elements in five groupsSix elements in five groups
Special elements–One aspherical element
CoatingsLens coating optimised for digital cameras to reduce ghosting and flareSuper Spectra anti-reflection coating
Aperture detailMinimum f/22 with one-third-stop camera aperture increments–
DiaphragmSeven blades with a circular apertureSeven blades
Angle of viewFull-frame horizontal 40°; vertical 27°; diagonal 46°Full-frame horizontal40°, vertical27°30′ and diagonal46°
Mount and compatibility
MountsCanon EFCanon RF
Image circleFull frameFull frame
CompatibilityCanon EF cameras, including full-frame and APS-C DSLRsCanon EOS R cameras; full-frame RF mount. Distinct from EF50mmF1.8STM and RF50mmF1.2LUSM
Teleconverter support–Canon RF extenders not compatible
Adaptor supportCanon UK supports EOS M cameras with an EF-EOS M mount adaptor–
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.35 m0.3 m
Maximum magnification0.21×0.25×
Optical stabilisation–No
Autofocus detailGear-type stepping motor; manual override after autofocus with the camera set to One-Shot AFSTM autofocus; electronic manual focus. Photography Blog reports selection of manual focus through the camera menu
Focus distance detailElectronic focus ring requires camera power; no distance scale (Digital Camera World)Minimum focus distance0.30m; maker table does not distinguish AF and MF figures, so no mode inferred. Extending inner tube during close focusing, as documented by OpticalLimits
Magnification detailEF12 II extension tube gives 0.45–0.24×; EF25 II gives 0.74–0.53×Maker maximum magnification0.25×; no unpublished AF/MF distinction inferred
Stabilisation detail–No lens optical IS; compatible cameras may provide body stabilisation separately
Design
Filter diameter49 mm43 mm
Maximum diameter69.2 mm69.2 mm
Length39.3 mm40.5 mm
Weight160 g160 g
Controls–Shared focus/control ring with focus-control selector; control mode can adjust camera settings
Filter detail–43mm front filter thread; maker lists Canon250D/500D close-up lenses and PL-C B circular polariser incompatible
Weather resistance–UK maker dust/moisture resistance entry is a dash; OpticalLimits explicitly reports no weather sealing
Dimensions detail69.2 mm maximum diameter × 39.3 mm length in the retracted stateApproximately69.2mm maximum diameter ×40.5mm length, measured retracted by Canon
Weight detailApproximately 160 g according to Canon UK specifications and Camera Museum; the UK store dimension panel instead lists 159 gApproximately160g lens
Lens hoodOptional ES-68ES-65B, sold separately
In the boxLens, E-49 front cap, Lens Dust Cap E and user manualLens, E-43 front cap and Lens Dust Cap RF; hood and LP1014 pouch are optional according to UK maker specifications
Release detailMarketed in May 2015 according to Canon Camera MuseumDecember2020 marketed month in Canon Camera Museum. Canon Canada scheduled mid-December2020 availability; Canon Japan records first sale24December2020. Headline retains month because the exact earliest international retail day is not documented; Japan's later day is not presented as a worldwide date

More comparisons