ZEISS IKON CONTAFLEX I Instructions For Use Manual page 14

o
instance, with the lens set to 6 feet (Fig. 6),
the left-hand figure 8 is op!:,osite a bout
4
1
/ 2
feet, and the right-hand figure 8 op-
posite about 9 feet. Thus for a subject
6 feet away and with the lens stopped
down to
fl8,
everything between about
41/2 and 9 feet will be sharp. The table
on page 16 gives more exact values.
You can equally go about it the other
way round and measure with the range-
finder the nearest and farth est points of
the subject that have to be sharp. Then
simply find the required aperture from
th e depth of field scale.
For technical reasons there is a second scale below
the focusing scale (2), but it has no bearing on the
operation on the CONTAFLEX .
The Correct E.xposure
can be obtained from tables or determined
more accurately with the
ZEISS IKON IKO -
PI-lOT RAPID
photo-electric exposure meter.
Th e exposure time (shutter speed) depends
on the speed of the film, the general
subject brightness, the aperture, and the
fa ctor of any filter that may be used. Do
not stop down further than necessary to
14