Honeywell PENTAX SPOTMATIC IIa Operating Manual page 21

4. Set the camera lens to the selected f/stop. You may now creatively
use your Remote Auto/Strobonar for on or off camera lighting with
assurance of perfect exposure automatically within the distance range
of your selected f/stop.
5. To determine range, turn the exposure dial on the back of the Remote
Auto/Strobonar until the ASA value of the film you are using is op¬
posite the ASA index. Maximum range is indicated opposite your select¬
ed stop. Minimum range is about 1/10 of the maximum range.
6. For film speeds not on the dial, set a film speed on the dial that is a
whole multiple of the film you are using (see step 2). Then choose a
stop in the normal manner (see step 3). If you are using a film that
is double the setting on the dial, then decrease the aperture of the lens
one full f/stop from the f/stop indicated on the Strobonar-Eye dial.
EXAMPLE: If you desire to use
ASA 800 (DIN 30) film, set the
Strobo-Eye ASA index (Z) to ASA
400 (DIN 27). Turn outer dial
until the ASA index is opposite
range index A. Observe that f/8
appears opposite the f/stop index.
Now, decrease lens aperture on
your camera one stop to f/11.
If you are using ASA 1600 (DIN
33), set Strobo-Eye ASA index to
400, select your desired f/stop and
decrease the camera lens aperture
two full stops.
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