Canon EF-S lens mount

E772865

Canon lens mount camera lens mount

The Canon EF-S lens mount is a camera lens interface designed by Canon specifically for its APS-C sensor EOS digital SLR cameras, supporting smaller, lighter lenses optimized for crop-sensor bodies.

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All labels observed (4)

Label	Occurrences
Canon EF-S lenses	3
Canon EF-S mount	2
Canon EF-S lens mount canonical	1
Canon EF-S lenses (on compatible APS-C bodies)	1

How this entity was disambiguated

This entity first appeared as the object of triple T9000562 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Canon EF-S lens mount
Context triple: [Canon EOS, uses, Canon EF-S lens mount]

A. Canon EF lens mount
The Canon EF lens mount is Canon's autofocus-enabled bayonet mount system introduced in 1987 for its EOS series cameras, supporting a wide range of interchangeable lenses for both film and digital SLRs.
B. Canon EF lenses
Canon EF lenses are a widely used family of autofocus SLR camera lenses introduced by Canon in 1987 for its EOS system, known for their electronic lens mount and extensive range from consumer to professional optics.
C. Sony A-mount
Sony A-mount is a lens mount system originally developed by Minolta and later adopted by Sony for its DSLR and SLT cameras, supporting a wide range of autofocus A-mount lenses.
D. Fujifilm X-mount
Fujifilm X-mount is Fujifilm’s interchangeable lens mount system designed for its APS-C mirrorless digital cameras, supporting a wide range of XF and XC lenses.
E. Nikon F-mount DSLR system
The Nikon F-mount DSLR system is Nikon’s long-standing line of digital single-lens reflex cameras and lenses built around the historic F lens mount introduced in 1959.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Canon EF-S lens mount
Target entity description: The Canon EF-S lens mount is a camera lens interface designed by Canon specifically for its APS-C sensor EOS digital SLR cameras, supporting smaller, lighter lenses optimized for crop-sensor bodies.

A. Canon EF lens mount
The Canon EF lens mount is Canon's autofocus-enabled bayonet mount system introduced in 1987 for its EOS series cameras, supporting a wide range of interchangeable lenses for both film and digital SLRs.
B. Canon EF lenses
Canon EF lenses are a widely used family of autofocus SLR camera lenses introduced by Canon in 1987 for its EOS system, known for their electronic lens mount and extensive range from consumer to professional optics.
C. Sony A-mount
Sony A-mount is a lens mount system originally developed by Minolta and later adopted by Sony for its DSLR and SLT cameras, supporting a wide range of autofocus A-mount lenses.
D. Fujifilm X-mount
Fujifilm X-mount is Fujifilm’s interchangeable lens mount system designed for its APS-C mirrorless digital cameras, supporting a wide range of XF and XC lenses.
E. Nikon F-mount DSLR system
The Nikon F-mount DSLR system is Nikon’s long-standing line of digital single-lens reflex cameras and lenses built around the historic F lens mount introduced in 1959.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	Canon lens mount ⓘ camera lens mount ⓘ
abbreviationExpansion	Electro-Focus Short back focus ⓘ
alignmentMarkColor	white ⓘ
allows	lighter lenses ⓘ shorter back-focus designs ⓘ smaller lenses ⓘ
alsoUsedFor	video recording on DSLR bodies ⓘ
backwardCompatibility	accepts Canon EF lenses ⓘ
basedOn	Canon EF lens mount ⓘ
brand	Canon EOS ⓘ
compatibleSensorFormat	APS-C ⓘ
designedForCropFactor	1.6x ⓘ
designer	Canon Inc. ⓘ
EFAlignmentMarkColor	red ⓘ
electricalContacts	same as Canon EF mount ⓘ
flangeFocalDistance	44.0 mm ⓘ
forwardCompatibility	EF-S lenses not usable on full-frame EF bodies ⓘ
introducedBy	Canon EOS 300D ⓘ linked to: Canon EOS
introducedInYear	2003 ⓘ
manufacturer	Canon Inc. ⓘ
marketPosition	consumer and enthusiast APS-C segment ⓘ
mountStandard	Canon EF family ⓘ linked to: Canon EF lenses
mountType	bayonet ⓘ
namingMeaning	Short back focus ⓘ
notCompatibleWith	Canon EOS film SLR bodies ⓘ linked to: Canon EOS Canon full-frame EOS DSLRs without modification ⓘ
optimizedFor	APS-C image circle ⓘ
partOf	Canon EOS system ⓘ linked to: Canon EOS
physicalKeying	prevents mounting on most full-frame EF cameras ⓘ
primaryUse	still photography ⓘ
region	global ⓘ
supportsAutofocus	true ⓘ
supportsElectronicApertureControl	true ⓘ
supportsFocusingModes	autofocus ⓘ manual focus ⓘ
supportsImageStabilizationCommunication	true ⓘ
supportsLensCPUCommunication	true ⓘ
supportsLensTypes	macro lenses ⓘ prime lenses ⓘ ultra-wide-angle lenses ⓘ zoom lenses ⓘ
typicalFocalLengthRange	wide-angle to telephoto for APS-C ⓘ
usedByCameraSeries	Canon EOS 10D successor models with APS-C sensors ⓘ Canon EOS 7D series ⓘ linked to: Canon EOS Canon EOS Rebel series ⓘ linked to: Canon EOS Canon EOS xx0D series ⓘ linked to: Canon EOS Canon EOS xxD APS-C series ⓘ linked to: Canon EOS
usedOn	Canon APS-C DSLR cameras ⓘ linked to: Canon EOS

How these facts were elicited