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Flange focal distance

For an interchangeable lens camera, the flange focal distance (FFD) (also known as the flange-to-film distance, flange focal depth, flange back distance (FBD), flange focal length (FFL), back focus or register, depending on the usage and source) of a lens mount system is the distance from the mounting flange (the interlocking metal rings on the camera…

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Flange focal distance

Nodes18
Edges17
Triples9
Avg. degree1.89
Density0.111111
Components1

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Flange focal distance

Top relations

related to Precision · 3
Flange focal distance → Any, Flange, Professional
related to Film use · 2
Flange focal distance → Due, Therefore
is a · 1
Flange focal distance → fixed mechanical specification of a given camera system
related to Standard mounts · 1
Flange focal distance → Typically

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Important terminology

lens camera distance ffd flange focal adapter focus lenses adapted longer shorter film image simple non-optical depth system mount mounting

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Flange focal distanceis afixed mechanical specification of a given camera system0.90text
the sizesinstance ofother factors0.80text
positions of the mounting flanges will influence whether a lens can be adapted without opticsinstance ofother factors0.80text
Flange focal distancerelated to Film useDue0.60section
Flange focal distancerelated to Film useTherefore0.60section
Flange focal distancerelated to PrecisionFlange0.60section
Flange focal distancerelated to PrecisionProfessional0.60section
Flange focal distancerelated to PrecisionAny0.60section
Flange focal distancerelated to Standard mountsTypically0.60section

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