focal length

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Related to Back focal length: focal distance, Focus length

focal length

n. Abbr. f
The distance of a lens or mirror to its focal point. Also called focal distance, focus.

focal length

or

focal distance

n
(General Physics) the distance from the focal point of a lens or mirror to the reflecting surface of the mirror or the centre point of the lens

fo′cal length`



n.
the distance from a focal point of a lens or mirror to the corresponding principal plane.
Also called fo′cal dis`tance.

fo·cal length

(fō′kəl)
The distance from the surface of a lens or mirror to the point where the light rays converge to form an image (the point of focus).
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.focal length - the distance from a lens to its focusfocal length - the distance from a lens to its focus
distance - the property created by the space between two objects or points
Translations
ohnisková vzdálenost
brændvidde
polttoväli
brandpuntsafstand
ogniskowa
distância focal
brännvidd