Canon RF 28mm F2.8 STM vs Canon RF 75–300mm F4–5.6

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RF 28mm F2.8 STM compared with RF 75–300mm F4–5.6

	CanonRF 28mm F2.8 STM	CanonRF 75–300mm F4–5.6
Overview
Released
Released	July 2023	May 2025
Optics
Lens type
Lens type	Prime	Zoom
Focal length
Focal length	28 mm	75–300 mm
Maximum aperture
Maximum aperture	f/2.8	f/4–5.6
Minimum aperture
Minimum aperture	f/22	f/32–45
Optical construction
Optical construction	Eight elements in six groups	Thirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 III
Coatings
Coatings	–	Super Spectra; no fluorine coating
Aperture detail
Aperture detail	–	Maximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectively
Special elements
Special elements	Three plastic-moulded aspherical elements; Super Spectra coating; no fluorine coating	–
Diaphragm
Diaphragm	Seven blades, circular aperture	Seven blades
Angle of view
Angle of view	–	Full-frame diagonal 32°11′–8°15′; horizontal 27°–6°50′; vertical 18°11′–4°35′
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 RF mount for full-frame and APS-C EOS R cameras; 120–480 mm equivalent field of view on Canon APS-C
Teleconverter support
Teleconverter support	–	Not compatible with RF extenders (The-Digital-Picture)
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.23 m	1.5 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	DC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detail
Focus distance detail	Minimum focusing distance 0.23 m	1.5 m minimum focus; front element and focus ring rotate during focusing (Digital Camera World and The-Digital-Picture)
Magnification detail
Magnification detail	Maximum 0.17× reproduction	0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detail
Stabilisation detail	No lens optical IS; compatible camera stabilisation is separate	No lens optical stabilisation
Video features
Video features	–	Substantial focus breathing in The-Digital-Picture's test
Design
Dust and moisture resistant
Dust and moisture resistant	No	–
Filter diameter
Filter diameter	55 mm	58 mm
Maximum diameter
Maximum diameter	69.2 mm	71.2 mm
Length
Length	24.7 mm	146.1 mm
Weight
Weight	120 g (better)	507 g
Controls
Controls	Combined focus/control ring with AF/Control/MF selector	Manual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom design
Zoom design	–	Extending zoom barrel; further extension and front rotation during focusing (Digital Camera World)
Filter detail
Filter detail	–	58 mm front thread rotates during focusing
Weather resistance
Weather resistance	No dust or moisture resistance	Canon UK's table lists dust/moisture resistance, but Digital Camera World and The-Digital-Picture both report no weather sealing
Dimensions detail
Dimensions detail	Approximately 69.2 mm maximum diameter × 24.7 mm length, retracted	71.2 mm maximum diameter × 146.1 mm retracted length
Weight detail
Weight detail	Approximately 120 g lens	Approximately 507 g lens
Lens hood
Lens hood	EW-55, sold separately	Optional ET-60 hood, not included
In the box
In the box	Lens, E-55 front cap, RF lens dust cap and user manual	Lens, E-58 II lens cap, RF dust cap and user manual
Release detail
Release detail	July 2023 marketed month in Canon Camera Museum	May 2025 release confirmed retrospectively by Canon's February 2026 press release and Canon Camera Museum