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foaming
foamingly
foamless
foamy
Fob
Fob chain
fob off
FOC
Focal
focal distance
Focal distance of a telescope
Focal distance, or length, of a lens or mirror
focal epilepsy
focal infection
focal length
focal point
-- focal ratio --
focal seizure
focalisation
focalise
Focalization
Focalize
focally
Focillate
Focillation
Focimeter
FOCL
FOCS
Focus
focus group
focus on
Focus tube
focused
focal ratio
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Noun
1.
focal ratio
-
the
ratio
of
the
focal
length
to
the
diameter
of
a
(
camera
)
lens
system
Synonyms:
f number
,
stop number
,
speed
f
number
,
ratio
,
speed
,
stop
number
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