Sears KS-2 - Manual (Page 14)

* When using a polarizing filter, depending on the angle of
rotation, there may be cases in which you cannot see the liquid
crystal indications.
8. AE (AUTOMATIC EXPOSURE)
PHOTOGRAPHY
(NOTE FROM MIKE B. - This is will apply to any
Chinon, Pentax or Ricoh automatic camera)
Your KS-2 camera enables you to use automatic
exposure where the shutter speed is automatically
selected, or manual exposure where you may select
the shutter speed yourself.
[NOTE: Mike B. - The shutter speed is chosen by
the meter reading what the lens F-stop is set too at
that time. Change the F-stop and a different shutter
speed will be chosen.]
Press the front button to turn on the metering system (most
cameras have the meter only stay on for a few minutes. Other
brands require you to just gently press the shutter button to activate
the meter system.)