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Using the CQS Prism Finder (3)
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Meter Coupling Range
The range of usable shutter speeds
varies in accordance with the film
speed
(ASA).
As the shutter speeds
shown in the shaded area of the dia-
gram below are beyond the range of
the meter, the shutter speed dial is
provided with a safety lock to prevent
one from entering the non-usable zone.
For example, it can be seen from the
diagram that 1/8 sec. is in the non-
usable zone when using film rated at
800
ASA
(or higher); consequently,
when the
ASA
dial of the CdS Finder is
set to 800, the shutter speed dial can-
not be set to 1/8 sec.
*To conserve battery power, keep the
*To obtain optimum results, follow the
exposure meter switch set to OFF
same precautions outlined for the PD
whenever the meter is not in use. Even
Prism Finder (see “Correct Exposure
when forgetting to set the switch to
Measurement”, p.38).
OFF, whenever the CdS Prism Finder
is removed from the camera, the expo-
sure meter is automatically switched
off because of the small safety switch
built into the bottom of the finder.
Usable Shutter
Speeds
(unshaded area)