VOIGTLANDER BESSAMATIC - Aperture and Depth of Field; Reading Off Depth of Field

I
I
v
I
I
i
Aperture and depth of
field
Depth
of field
is thot
port
of
the
picture
oreo,
in front of ond behind
the
point
of focus,
which
will
be
rendered shorp.
This is dependent on
the
op-
erture, which
you
hove set.
At lorge opertures
(e.
g.
f
2.8
or
4)
the depth of
field is limited
-
ot smoller
opertures
(e.g.f
I or
l1) it is
greoter.
Reading off
the
depth
of
field
o
When
using
the
Color-Lonthor
f
2.8/50 mm., ond
hoving olreody set
the
distonce,
hold the comero
so
thot the focussing scole
(1)
os well
os the
double
row
of
operture numbers
on
the
lens
ore visible.
Depth of
field
extends
now
from the distonce shown obove
the operture number of
the
left of
mork
A
to the
distonce
obove
the some operture
to
the
right
of
A.
o
All other
interchongeoble
lenses
with
fixed focol length hove on outomotic
depth
of
field indicotion.
This consists of
two red morks
(8)
which
ride
over
the focussing
scole ond
outomoticolly show
the
depth
of
field,
i. e.
the morks
move to o smoller or
greoter
distonce
from
eoch
other when
you
iurn
the outomotic operture
knob
(ll).
3
The
Voigtlcinder
Zoomor
t2.8
3GB2
mm. lens
is
on exception.
This
is
supplied
complete with
o depth of
field toble in the shope of o colculoting
disc.