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Filters and Exposure Compensation
When using filters the exposure must be adjusted
according to the exposure factor of the filter to
be used.
Adjustment by Changing the Film Speed Dial
Setting
Divide the ASA index of the loaded film with the
exposure factor of the filter to be used.
The figure
obtained is the ASA index of the film when the
filter is used.
Therefore, set the film speed dial
to this ASA figure.
For example, when a Y3 (exposure factor 2} filter
is used with an ASA 100 film, the compensation
ASA number would be:
100 :-2 = 50. In
other
words, the film speed dial should be reset at ASA
50.
Adjustment by Changing the f/Stop
Turn the master switch to "MANU.". Adjust the
f/stop by turning the aperture control ring accord¬
ing to the exposure factor of the filter to be used.
The f/stop graduations are indicated in multiple.
Therefore, when using a filter with an exposure
factor of 2, the f/stop is increased by 1 gradua¬
tion. When the exposure factor is 4, it is increased
by 2 graduations.
Adjustment by Using Compensating Filter for
CdS Meter
When using an ND4 filter, a compensating ND4
filter to be attached onto the CdS window is
available. In this case, there is no need to change
the film speed dial setting or the f/stop.
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