Canon RF 28mm F2.8 STM vs Canon RF 50mm F1.8 STM

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RF 28mm F2.8 STM compared with RF 50mm F1.8 STM

	CanonRF 28mm F2.8 STM	CanonRF 50mm F1.8 STM
Overview
Released
Released	July 2023	December 2020
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	28 mm	50 mm
Maximum aperture
Maximum aperture	f/2.8	f/1.8
Minimum aperture
Minimum aperture	f/22	f/22
Optical construction
Optical construction	Eight elements in six groups	Six elements in five groups
Special elements
Special elements	Three plastic-moulded aspherical elements; Super Spectra coating; no fluorine coating	One aspherical element
Coatings
Coatings	–	Super Spectra anti-reflection coating
Diaphragm
Diaphragm	Seven blades, circular aperture	Seven blades
Angle of view
Angle of view	–	Full-frame horizontal40°, vertical27°30′ and diagonal46°
Mount and compatibility
Mounts
Mounts	Canon RF	Canon RF
Image circle
Image circle	Full frame	Full frame
Compatibility
Compatibility	Canon RF mount, full-frame image circle; RF extenders not compatible	Canon EOS R cameras; full-frame RF mount. Distinct from EF50mmF1.8STM and RF50mmF1.2LUSM
Teleconverter support
Teleconverter support	–	Canon RF extenders not compatible
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.23 m	0.3 m
Maximum magnification
Maximum magnification	0.17×	0.25×
Optical stabilisation
Optical stabilisation	No	No
Autofocus detail
Autofocus detail	STM autofocus and electronic manual focusing	STM autofocus; electronic manual focus. Photography Blog reports selection of manual focus through the camera menu
Focus distance detail
Focus distance detail	Minimum focusing distance 0.23 m	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 detail
Magnification detail	Maximum 0.17× reproduction	Maker maximum magnification0.25×; no unpublished AF/MF distinction inferred
Stabilisation detail
Stabilisation detail	No lens optical IS; compatible camera stabilisation is separate	No lens optical IS; compatible cameras may provide body stabilisation separately
Design
Dust and moisture resistant
Dust and moisture resistant	No	–
Filter diameter
Filter diameter	55 mm	43 mm
Maximum diameter
Maximum diameter	69.2 mm	69.2 mm
Length
Length	24.7 mm	40.5 mm
Weight
Weight	120 g (better)	160 g
Controls
Controls	Combined focus/control ring with AF/Control/MF selector	Shared focus/control ring with focus-control selector; control mode can adjust camera settings
Filter detail
Filter detail	–	43mm front filter thread; maker lists Canon250D/500D close-up lenses and PL-C B circular polariser incompatible
Weather resistance
Weather resistance	No dust or moisture resistance	UK maker dust/moisture resistance entry is a dash; OpticalLimits explicitly reports no weather sealing
Dimensions detail
Dimensions detail	Approximately 69.2 mm maximum diameter × 24.7 mm length, retracted	Approximately69.2mm maximum diameter ×40.5mm length, measured retracted by Canon
Weight detail
Weight detail	Approximately 120 g lens	Approximately160g lens
Lens hood
Lens hood	EW-55, sold separately	ES-65B, sold separately
In the box
In the box	Lens, E-55 front cap, RF lens dust cap and user manual	Lens, E-43 front cap and Lens Dust Cap RF; hood and LP1014 pouch are optional according to UK maker specifications
Release detail
Release detail	July 2023 marketed month in Canon Camera Museum	December2020 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