Canon RF 7-14mm F2.8-3.5L FISHEYE STM vs Canon RF 75–300mm F4–5.6

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RF 7-14mm F2.8-3.5L FISHEYE STM compared with RF 75–300mm F4–5.6

	CanonRF 7-14mm F2.8-3.5L FISHEYE STM	CanonRF 75–300mm F4–5.6
Overview
Released
Released	February 2026	May 2025
Optics
Lens type
Lens type	Zoom	Zoom
Focal length
Focal length	7–14 mm	75–300 mm
Maximum aperture
Maximum aperture	f/2.8–3.5	f/4–5.6
Minimum aperture
Minimum aperture	f/22–29	f/32–45
Optical construction
Optical construction	16 elements in 11 groups	Thirteen elements in nine groups; Canon states the optical design is adapted from the EF 75–300mm F4–5.6 III
Special elements
Special elements	Five UD and two replica aspherical elements	–
Coatings
Coatings	Three ASC coatings and Super Spectra; fluorine coating on the front element	Super Spectra; no fluorine coating
Aperture detail
Aperture detail	f/2.8–22 at 7 mm and f/3.5–29 at 14 mm; maker minimum-aperture figures use 1/3-stop display	Maximum f/4 at 75 mm and f/5.6 at 300 mm; minimum f/32 and f/45 respectively
Diaphragm
Diaphragm	Nine aperture blades	Seven blades
Angle of view
Angle of view	Horizontal 190°–149°45′, vertical 190°–99°50′ and diagonal 190°–180° on full frame	Full-frame diagonal 32°11′–8°15′; horizontal 27°–6°50′; vertical 18°11′–4°35′
Projection
Projection	Circular 190° fisheye at 7 mm and frame-filling diagonal 180° fisheye at 14 mm on full frame; circular mode uses equidistant projection; neither is rectilinear	–
Mount and compatibility
Mounts
Mounts	Canon RF	Canon RF
Image circle
Image circle	Full frame	Full frame
Compatibility
Compatibility	Canon EOS R full-frame or APS-C cameras; APS-C cannot show the complete circular image and uses approximately 8.7 mm for diagonal coverage (Digital Camera World)	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	Canon RF extenders not compatible	Not compatible with RF extenders (The-Digital-Picture)
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.15 m (autofocus)	1.5 m
Maximum magnification
Maximum magnification	0.35× (autofocus)	0.25×
Optical stabilisation
Optical stabilisation	No	No
Autofocus detail
Autofocus detail	Leadscrew-type STM focusing with position sensors; full-time manual focus; maker rear-focusing design maintains length during focus	DC motor autofocus; no full-time manual focus override (Digital Camera World)
Focus distance detail
Focus distance detail	Maker specifies 0.15 m throughout the 7–14 mm range in autofocus	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 0.35× at 14 mm in autofocus, measured at the image centre; do not assume identical magnification across a fisheye image	0.06× at 75 mm and 0.25× at 300 mm
Stabilisation detail
Stabilisation detail	No lens optical IS; maker separately lists compatible camera IBIS at seven stops at the centre/14 mm under CIPA-2024 conditions	No lens optical stabilisation
Video features
Video features	Circular fisheye material can be converted to monoscopic 2D 180° VR with EOS VR Utility on supported cameras; not a stereoscopic dual-fisheye lens; conversion compatibility depends on body and recording format	Substantial focus breathing in The-Digital-Picture's test
Design
Filter diameter
Filter diameter	–	58 mm
Dust and moisture resistant
Dust and moisture resistant	Yes	–
Maximum diameter
Maximum diameter	76.5 mm	71.2 mm
Length
Length	109.4 mm	146.1 mm
Weight
Weight	476 g (better)	507 g
Controls
Controls	Zoom, focus and customisable control rings; AF/MF switch, function button and zoom lock/limit control (Digital Camera World)	Manual focus and zoom rings, AF/MF switch; no custom control ring (The-Digital-Picture)
Zoom design
Zoom design	Internal zoom and focus retain the same physical lens length (Amateur Photographer; Digital Camera World)	Extending zoom barrel; further extension and front rotation during focusing (Digital Camera World)
Filter detail
Filter detail	No front screw-in filter thread; rear Drop-in Filter A system; supplied clear filter and optional Drop-in Variable ND Filter A or Drop-in Circular Polarizing Filter A	58 mm front thread rotates during focusing
Weather resistance
Weather resistance	Dust and moisture resistant with mount gasket; Canon states attachment to a camera is needed and protection does not prevent all dust or water ingress; no waterproof/IP claim	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 76.5 mm maximum diameter × 109.4 mm length, excluding detachable hood	71.2 mm maximum diameter × 146.1 mm retracted length
Weight detail
Weight detail	Approximately 476 g lens	Approximately 507 g lens
Lens hood
Lens hood	Detachable EW-76; remove for circular fisheye shooting to avoid the hood entering the image (Amateur Photographer; Digital Camera World)	Optional ET-60 hood, not included
In the box
In the box	Drop-in clear filter included	Lens, E-58 II lens cap, RF dust cap and user manual
Release detail
Release detail	Canon Japan specifies first sale on 20 February 2026; US announcement expected availability by the end of February, rather than the same exact regional day	May 2025 release confirmed retrospectively by Canon's February 2026 press release and Canon Camera Museum