Canon RF 100–400mm F5.6–8 IS USM vs Canon RF 7-14mm F2.8-3.5L FISHEYE STM

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RF 100–400mm F5.6–8 IS USM compared with RF 7-14mm F2.8-3.5L FISHEYE STM

	CanonRF 100–400mm F5.6–8 IS USM	CanonRF 7-14mm F2.8-3.5L FISHEYE STM
Overview
Released
Released	October 2021	February 2026
Optics
Lens type
Lens type	Zoom	Zoom
Focal length
Focal length	100–400 mm	7–14 mm
Maximum aperture
Maximum aperture	f/5.6–8	f/2.8–3.5
Minimum aperture
Minimum aperture	f/32–45	f/22–29
Optical construction
Optical construction	12 elements in nine groups	16 elements in 11 groups
Special elements
Special elements	One UD element and one PMo aspherical element	Five UD and two replica aspherical elements
Coatings
Coatings	Super Spectra; no fluorine coating, per UK maker table	Three ASC coatings and Super Spectra; fluorine coating on the front element
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
Diaphragm
Diaphragm	Nine blades	Nine aperture blades
Angle of view
Angle of view	–	Horizontal 190°–149°45′, vertical 190°–99°50′ and diagonal 190°–180° on full frame
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 RF mount, full-frame image circle; incompatible with EF DSLRs and EOS M cameras	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)
Teleconverter support
Teleconverter support	RF1.4× gives 140–560 mm f/8–11 and maximum 0.58×; RF2× gives 200–800 mm f/11–16 and maximum 0.83×. Maker confirms autofocus and IS, with reduced AF coverage on listed EOS R bodies; extenders usable throughout the zoom range	Canon RF extenders not compatible
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.88 m	0.15 m (autofocus)
Maximum magnification
Maximum magnification	0.41×	0.35× (autofocus)
Optical stabilisation
Optical stabilisation	Yes	No
Autofocus detail
Autofocus detail	Nano USM autofocus and electronic manual focus	Leadscrew-type STM focusing with position sensors; full-time manual focus; maker rear-focusing design maintains length during focus
Focus distance detail
Focus distance detail	Maker minimum focus 1.2 m at 100 mm, 0.88 m at 200 mm, 0.95 m at 300 mm and 1.05 m at 400 mm. Main value is the closest published distance at 200 mm; Cameralabs’ approximate constant-distance observation does not replace the maker’s per-focal-length table	Maker specifies 0.15 m throughout the 7–14 mm range in autofocus
Magnification detail
Magnification detail	0.09× at 100 mm, 0.24× at 200 mm, 0.34× at 300 mm and 0.41× at 400 mm; no unpublished AF/MF distinction inferred	Maximum 0.35× at 14 mm in autofocus, measured at the image centre; do not assume identical magnification across a fisheye image
Stabilisation detail
Stabilisation detail	Optical IS rated 5.5 stops at 400 mm on EOS R under CIPA, yaw/pitch; coordinated EOS R5 body/lens IS rated six stops under the same maker conditions. Cameralabs measured approximately five stops at 100 mm and three at 400 mm with EOS R6, a different test condition	No lens optical IS; maker separately lists compatible camera IBIS at seven stops at the centre/14 mm under CIPA-2024 conditions
Video features
Video features	Cameralabs found little focus breathing and mostly maintained focus while zooming in its tests; these are reviewer observations rather than maker parfocal certification	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
Design
Dust and moisture resistant
Dust and moisture resistant	No	Yes
Filter diameter
Filter diameter	67 mm	–
Maximum diameter
Maximum diameter	79.5 mm	76.5 mm
Length
Length	164.7 mm	109.4 mm
Weight
Weight	635 g	476 g (better)
Controls
Controls	Separate zoom, electronic manual focus and custom control rings; AF/MF and IS switches; zoom lock	Zoom, focus and customisable control rings; AF/MF switch, function button and zoom lock/limit control (Digital Camera World)
Zoom design
Zoom design	Extending zoom barrel; main maker length measured retracted	Internal zoom and focus retain the same physical lens length (Amateur Photographer; 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
Weather resistance
Weather resistance	UK maker specification explicitly states no dust/moisture 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
Dimensions detail
Dimensions detail	Approximately 79.5 mm maximum diameter × 164.7 mm length when retracted	Approximately 76.5 mm maximum diameter × 109.4 mm length, excluding detachable hood
Weight detail
Weight detail	Approximately 635 g lens	Approximately 476 g lens
Lens hood
Lens hood	ET-74B, optional accessory	Detachable EW-76; remove for circular fisheye shooting to avoid the hood entering the image (Amateur Photographer; Digital Camera World)
In the box
In the box	–	Drop-in clear filter included
Release detail
Release detail	October 2021 marketed month in Canon Camera Museum, matching Canon Canada’s original October availability. No exact worldwide first-sale day inferred; no direct replacement of brighter EF or RF L-series zooms assumed	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