Canon RF 7-14mm F2.8-3.5L FISHEYE STM vs Canon RF 800mm F5.6L IS USM

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RF 7-14mm F2.8-3.5L FISHEYE STM compared with RF 800mm F5.6L IS USM

	CanonRF 7-14mm F2.8-3.5L FISHEYE STM	CanonRF 800mm F5.6L IS USM
Overview
Released
Released	February 2026	May 2022
Optics
Lens type
Lens type	Zoom	Prime
Focal length
Focal length	7–14 mm	800 mm
Maximum aperture
Maximum aperture	f/2.8–3.5	f/5.6
Minimum aperture
Minimum aperture	f/22–29	f/64
Optical construction
Optical construction	16 elements in 11 groups	Twenty-six elements in eighteen groups
Special elements
Special elements	Five UD and two replica aspherical elements	Two fluorite elements, one Super UD and one UD element
Coatings
Coatings	Three ASC coatings and Super Spectra; fluorine coating on the front element	Super Spectra and ASC; 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	Maximum f/5.6; minimum f/64
Diaphragm
Diaphragm	Nine aperture blades	Nine circular 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 3°05′; horizontal 2°35′; vertical 1°40′
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
Teleconverter support
Teleconverter support	Canon RF extenders not compatible	RF 1.4× gives 1120 mm f/8 with 0.49× magnification; RF 2× gives 1600 mm f/11 with 0.71×; AF and IS operate with either extender
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.15 m (autofocus)	2.6 m
Maximum magnification
Maximum magnification	0.35× (autofocus)	0.34×
Optical stabilisation
Optical stabilisation	No	Yes
Autofocus detail
Autofocus detail	Leadscrew-type STM focusing with position sensors; full-time manual focus; maker rear-focusing design maintains length during focus	Ring-type USM; electronic full-time manual focus requires compatible body settings; original EOS R, RP and Ra are unsupported, and R5/R6 require firmware 1.3.0 or later
Focus distance detail
Focus distance detail	Maker specifies 0.15 m throughout the 7–14 mm range in autofocus	2.6 m minimum focus; full range, 2.6–20 m and 20 m–infinity limiter settings; three manual-focus speeds and two stored focus presets
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	0.34× maximum magnification; approximately 206 × 138 mm subject fills a full-frame image at minimum focus
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	Canon UK and Japan rate optical IS at 4.5 stops with EOS R, R5 or R3 under CIPA yaw/pitch conditions; modes 1, 2 and 3
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	Aperture control in 1/8-stop increments; power-focus mode with two speeds selected by playback-ring rotation
Design
Dust and moisture resistant
Dust and moisture resistant	Yes	Yes
Filter diameter
Filter diameter	–	52 mm
Maximum diameter
Maximum diameter	76.5 mm	163 mm
Length
Length	109.4 mm	432 mm
Weight
Weight	476 g (better)	3,140 g
Controls
Controls	Zoom, focus and customisable control rings; AF/MF switch, function button and zoom lock/limit control (Digital Camera World)	Focus and playback rings, AF/PF/MF selector, focus-speed and preset switches, and four lens-function buttons
Zoom design
Zoom design	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	52 mm drop-in screw-type holder 52 (WIII), supplied with a clear Protect filter; compatible with optional drop-in polariser and gelatin holder
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	Dust- and moisture-resistant construction with heat-reflective paint
Dimensions detail
Dimensions detail	Approximately 76.5 mm maximum diameter × 109.4 mm length, excluding detachable hood	163 mm maximum diameter × 432 mm length
Weight detail
Weight detail	Approximately 476 g lens	Approximately 3,140 g lens
Tripod mount
Tripod mount	–	Supplied tripod collar and support foot
Lens hood
Lens hood	Detachable EW-76; remove for circular fisheye shooting to avoid the hood entering the image (Amateur Photographer; Digital Camera World)	ET-155 (WIII) included; shorter ET-155B optional
In the box
In the box	Drop-in clear filter included	Lens, drop-in screw-type filter holder 52 (WIII) with 52 mm Protect filter, E-180E cap, RF dust cap, ET-155 (WIII) hood, LS600 soft case, Lens Wide Strap B 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	First sale in Japan on 26 May 2022, stated by Canon Japan support; the original announcement promised late May