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Canon RF 100–500mm F4.5–7.1L 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 100–500mm F4.5–7.1L IS USMCanonRF 7-14mm F2.8-3.5L FISHEYE STM
Overview
ReleasedAugust 2020February 2026
Optics
Lens typeZoomZoom
Focal length100–500 mm7–14 mm
Maximum aperturef/4.5–7.1f/2.8–3.5
Minimum aperturef/32–51f/22–29
Optical construction20 elements in 14 groups16 elements in 11 groups
Special elementsSix UD elements and one Super UD elementFive UD and two replica aspherical elements
CoatingsASC anti-reflection coating, fluorine coating and heat-shield barrel paintThree ASC coatings and Super Spectra; fluorine coating on the front element
Aperture detailMaximum f/4.5 at 100 mm to f/7.1 at 500 mm; minimum f/32 at 100 mm to f/51 at 500 mm. Digital Camera World's f/54 table entry is inconsistent with maker specifications and is not usedf/2.8–22 at 7 mm and f/3.5–29 at 14 mm; maker minimum-aperture figures use 1/3-stop display
DiaphragmNine blades with circular apertureNine aperture blades
Angle of viewFull-frame horizontal 20°–4°, vertical 14°–2°45′ and diagonal 24°–5°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 EOS R cameras; full-frame image circle. Distinct from EF100–400mm F4.5–5.6L IS II USM and RF100–400mm F5.6–8 IS USMCanon 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 supportRF1.4× and RF2× compatible only with lens set to 300–500 mm; maker RF2× FAQ requires extension beyond 300 mm before attachment and restricts subsequent zoom operation to 300–500 mmCanon RF extenders not compatible
Focus and stabilisation
AutofocusYesYes
Minimum focus distance0.9 m0.15 m (autofocus)
Maximum magnification0.33×0.35× (autofocus)
Optical stabilisationYesNo
Autofocus detailDual Nano USM autofocus with electronically controlled floating focus; full-time manual focus. Digital Camera World's initial EOS R action test preceded the firmware improvements it identifies, and its EOS R5 tracking test was substantially betterLeadscrew-type STM focusing with position sensors; full-time manual focus; maker rear-focusing design maintains length during focus
Focus distance detailMaker minimum focus distance 0.9 m at 100 mm; Photography Blog reports 1.2 m at 500 mm. AF/MF mode distinction unpublished and omittedMaker specifies 0.15 m throughout the 7–14 mm range in autofocus
Magnification detailMaker maximum magnification 0.33× at 500 mm; no unpublished AF/MF distinction inferredMaximum 0.35× at 14 mm in autofocus, measured at the image centre; do not assume identical magnification across a fisheye image
Stabilisation detailLens optical IS rated five stops with EOS R at 500 mm under CIPA; coordinated EOS R5 body and lens IS rated six stops with required firmware, separately from lens-only ratingNo 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 diameter77 mm–
Maximum diameter93.8 mm76.5 mm
Length207.6 mm109.4 mm
Weight1,370 g476 g
ControlsZoom and focus rings, customisable control ring, adjustable zoom torque, AF/MF switch, Full or 3 m–infinity focus limiter and IS on/off/mode switchesZoom, focus and customisable control rings; AF/MF switch, function button and zoom lock/limit control (Digital Camera World)
Zoom designExtending zoom barrel; dimensions measured retractedInternal zoom and focus retain the same physical lens length (Amateur Photographer; Digital Camera World)
Filter detail77 mm front filter threadNo 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 requires attachment to a camera; does not completely prevent dust or water ingress and is not waterproofDust 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 detailApproximately 93.8 mm maximum diameter × 207.6 mm length, retractedApproximately 76.5 mm maximum diameter × 109.4 mm length, excluding detachable hood
Weight detailMaker Japan gives 1,370 g excluding tripod collar, which weighs approximately 160 g. Photography Blog and Digital Camera World list 1,530 g with collar; UK store's unexplained 2,250 g conflicts with the complete maker table and is not usedApproximately 476 g lens
Tripod mountRemovable rotating tripod collar, approximately 160 g; shown attached in the maker press photograph–
Lens hoodET-83F (WIII)Detachable EW-76; remove for circular fisheye shooting to avoid the hood entering the image (Amateur Photographer; Digital Camera World)
In the boxUK maker store lists lens, ET-83F (WIII) hood, E-77 II front cap, Lens Dust Cap RF and LZ1328 caseDrop-in clear filter included
Release detailCanon Japan's updated original announcement gives first sale 27 August 2020, consistent with Camera Museum marketed August. Region-specific retail day; exact UK first sale not inferred. Co-sold telephoto zooms are alternatives, with no inferred successor linkCanon 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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