With the use of the cameras KIEV 88 TTL metered prism you can determine the correct exposure times and the lens diaphragm apertures.
Advantage and convenience of the TTL measurement system lies in the automatic control of all factors affecting the value of the exposure time. The field of measurement of the exposure time meter is in the central part of the viewfinder field of vision and has an oval shape.
The meter can take measurements within the range of
brightness of 2
to 16 000 cd/m2.
Voltage of the power supply source is 4.5 V.
When preparing the prism viewfinder for operation set the film speed on its calculator by turning handle 42 until the film value in ISO units appears in window 43.
Set on the calculator the value of the lens speed by turning scale 45 until the appropriate value coincides with index 46.
The lens speed means the number corresponding to the maximum relative aperture. For example , for lens MC Arsat 80mm / f=2.8 the maximum relative aperture is 2.8.
Turn on the exposure meter by depressed button 44. Upon its
turning-on, release the button. The exposure time meter will operate
for 15 seconds ,
then it will automatically turn off.
For longer use
depress the
button again.
While viewing in viewfinder eyepiece 47, aim the camera
on the
object so that the image is arranged within the field of view of
the
viewfinder. In the
upper part of the field of view of the viewfinder you will see the
illumination
of one or more of the signals:
Should the left red signal be seen , slowly turn
calculator
ring 48 anti-clockwise until both
signal lights appear.
Should the red signal located on the
right be seen , turn ring 48 clockwise until both
signal lights appear.
With
the calculator in this position ,
choose
the "exposure-diaphragm" pair required for photographing by using the
exposure scale and the diaphragm scale.
For example , exposure 1/30 sec is
opposite
diaphragm value 2.8 , 1/15 s is opposite 4, 1/8 s is
opposite
5.6, 1/2 s is opposite 11.
All of these combinations on the scale are accurate.
Set these values of exposure and diaphragm on the
camera's shutter speed knob and on the lenses aperture scale.