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Canon RF 100–300mm F2.8L IS USM vs Canon RF 7-14mm F2.8-3.5L FISHEYE STM

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

CanonRF 100–300mm F2.8L IS USMCanonRF 7-14mm F2.8-3.5L FISHEYE STM
Overview
ReleasedMay 2023February 2026
Optics
Lens typeZoomZoom
Focal length100–300 mm7–14 mm
Maximum aperturef/2.8f/2.8–3.5
Minimum aperturef/22f/22–29
Optical constructionTwenty-three elements in eighteen groups16 elements in 11 groups
Special elementsOne fluorite, four UD and one glass-moulded aspherical elementFive UD and two replica aspherical elements
CoatingsSuper Spectra, ASC and fluorine coatingsThree ASC coatings and Super Spectra; fluorine coating on the front element
Aperture detailConstant maximum f/2.8; minimum f/22f/2.8–22 at 7 mm and f/3.5–29 at 14 mm; maker minimum-aperture figures use 1/3-stop display
DiaphragmNine bladesNine aperture blades
Angle of viewFull-frame diagonal 24°–8°15′; horizontal 20°–6°50′; vertical 14°–4°35′Horizontal 190°–149°45′, vertical 190°–99°50′ and diagonal 190°–180° on full frame
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
MountsCanon RFCanon RF
Image circleFull frameFull frame
CompatibilityCanon RF mount for full-frame and APS-C EOS R camerasCanon 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 supportRF 1.4× gives 140–420 mm f/4; RF 2× gives 200–600 mm f/5.6Canon RF extenders not compatible
Focus and stabilisation
AutofocusYesYes
Minimum focus distance1.8 m0.15 m (autofocus)
Maximum magnification0.16×0.35× (autofocus)
Optical stabilisationYesNo
Autofocus detailTwo Nano USM motors independently drive the electronic floating-focus groups; full-time electronic manual focusLeadscrew-type STM focusing with position sensors; full-time manual focus; maker rear-focusing design maintains length during focus
Focus distance detail1.8 m minimum focus throughout the zoom range; limiter selects full range or 6 m–infinityMaker specifies 0.15 m throughout the 7–14 mm range in autofocus
Magnification detail0.06× at 100 mm and 0.16× at 300 mmMaximum 0.35× at 14 mm in autofocus, measured at the image centre; do not assume identical magnification across a fisheye image
Stabilisation detailCanon rates lens optical IS at 5.5 stops under CIPA conditions, and coordinated IS at up to 6 stops with EOS R5 and compatible bodiesNo lens optical IS; maker separately lists compatible camera IBIS at seven stops at the centre/14 mm under CIPA-2024 conditions
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
Design
Dust and moisture resistantYesYes
Filter diameter112 mm–
Maximum diameter128 mm76.5 mm
Length323.4 mm109.4 mm
Weight2,590 g476 g
ControlsSeparate focus, zoom and clicking control rings; front lens-function buttons and focus-preset controlsZoom, focus and customisable control rings; AF/MF switch, function button and zoom lock/limit control (Digital Camera World)
Zoom designInternal zoom maintains barrel lengthInternal zoom and focus retain the same physical lens length (Amateur Photographer; Digital Camera World)
Filter detail112 mm front screw-in thread; no rear drop-in filterNo 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 resistanceDust- and moisture-resistant construction with heat-blocking white paintDust 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 detail128 mm maximum diameter × 323.4 mm lengthApproximately 76.5 mm maximum diameter × 109.4 mm length, excluding detachable hood
Weight detailApproximately 2,590 g, as listed by Canon UK, Canon Japan and Canon Camera MuseumApproximately 476 g lens
Tripod mountRotating tripod collar with support foot–
Lens hoodET-124 includedDetachable EW-76; remove for circular fisheye shooting to avoid the hood entering the image (Amateur Photographer; Digital Camera World)
In the boxLens, E-112 front cap, RF dust cap, ET-124 hood, LS100-300 soft case and user manualDrop-in clear filter included
Release detailMay 2023 first release confirmed by Canon's June 2023 retrospective announcement and Camera MuseumCanon Japan specifies first sale on 20 February 2026; US announcement expected availability by the end of February, rather than the same exact regional day

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