Diaphragm setting
Set the desired diaphragm
number on diaphragm setting
ring (17) of the lens opposite to
the mark on the lens mount.
When lenses with automatic
pressure diaphragm (ADB)-are
used, the diaphragm remains
fully open and closes to the set
value only when the shutter
release is pressed. The
diaphragm opens in the same
instant the shutter has run down.
By changing the diaphragm
operation selection switch (14)
from A (automatic operation) to
M (manual operation) or by
actuating the metering key (2) it
becomes possible to check the
depth of field already on the
viewfinder image.
Automatic exposure control system
There are two modes of light metering:
1. Metering by altering the diaphragm numeral at the lens with pre-selected shutter speed (being the preferred
method for general objects in satisfactory light).
2. Metering by altering the shutter speed with pre-selected diaphragm numeral (being recommended for low
light photography with a certain depth of field required).
Metering at pre-selected shutter speed
Set the shutter speed, press metering key (2). Turn diaphragm setting ring (17) until the meter needle, visible in
the viewfinder, will have centered to the circular mark. When the needle stands in the + range, an overexposure
will be obtained while its position in the --range will result in an underexposure. The diaphragm opens and
closes on rotating the diaphragm setting ring correspondingly thus compensation between subject brightness
and the combined shutter speed, diaphragm, and ASA/DIN settings is performed.
Metering at pre-selected diaphragm
number
Set the diaphragm numeral, press metering key (2). Turn shutter speed dial (1) until the meter needle visible in
the viewfinder will have centered to the circular mark. When the needle stands in the + range, an overexposure
will be obtained while its position in the--range will result in an underexposure. Don't set any intermediate
shutter speeds between the indexed positions. Should you not succeed in attaining a perfect balance, you can
make a precise correction by the diaphragm setting ring which may, of course, be set to intermediate values,
too.
