Focal distance, or length, of a lens or mirror

Definition of Focal distance, or length, of a lens or mirror

(Opt.) the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center.

See also: Focal

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flytrap
flywheel
Fm
fnese
FNMA
Fo
fo'c'sle
Foal
Foal teeth
Foalfoot
Foam
Foam cock
foaming
foamingly
foamless
foamy
Fob
Fob chain
Focal
Focal distance of a telescope
-Focal distance, or length, of a lens or mirror-
Focalization
Focalize
Focillate
Focillation
Focimeter
Focus
Focus tube
focused
focusing
focussed
Fodder
Fodderer
Fodient
Fodientia
Foe
Foehn
Foehood
Foeman
Foetal
Foetation
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