Contax 167MT - Depth of Field

When
the
lens is
focused
on a
subiect,
not
only the
subiect
itself,
but
also a certain zone in front
of and
behind it will
turn out
sharp
in
the
picture.
Ihis
rs
called
the depth of field
of a
lens
and it varies
as
follows:
@
The
smaller
the
aperture, the wider
the
depth
of
field,
and vice versa.
@
The
longer
the
subject distance,
the wider
the
depth
of
field,
and vice versa.
@
The
zone
of
sharpness behind
the
point
on which
the
lens
is focused
is
wider than
that
in
front
of
it.
In
the
case
of different lenses,
lenses with
a
shorter facal length
have
a wider
depth of field
than those with
a
longer
focal
length.