Definition of Camera obscura
Cam´e`ra ob`scu´ra
1.
(Opt.)
An
apparatus
in
which
the
images
of
external
objects
,
formed
by
a
convex
lens
or
a
concave
mirror
,
are
thrown
on
a
paper
or
other
white
surface
placed
in
the
focus
of
the
lens
or
mirror
within
a
darkened
chamber
,
or
box
,
so
that
the
outlines
may
be
traced
.
2.
(Photog.)
An
apparatus
in
which
the
image
of
an
external
object
or
objects
is
,
by
means
of
lenses
,
thrown
upon
a
sensitized
plate
or
surface
placed
at
the
back
of
an
extensible
darkened
box
or
chamber
variously
modified
; -
commonly
called
simply
the
camera
.
Related Words
chamber
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