Filter factor correction, Adjustment method 1 – Canon Model 7S User Manual

Page 76

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Filter Factor Correction

When

using

the

lilter,

exposure

must

adjusted

by adding the filter factor.

Adjustment Method 1

Changing the film spaed

Divide the film speed by the filter factor.

This

numerical

value

the

sensitivity

when

using

the filter. Accordingly, correct the film speed.

•

the

film

speed

ASA

100

and

the

filter

factor is 2, then it is 100 : 2 = 50. The film

speed must be adjusted to ASA 50.