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HANDBOOK OF PHOTOGRAPHY 



The wedge spectrograms for Eastman motion-picture negative films, together with 

 certain positive films to be described later, are found in Fig. 5. Except in the case of 

 duplicating negative and all positive films, which are used only with artificial light, the 



2.0 



w 1.0 - 



1.0 2.0 



Relative Log Exposure 



Fig. 7 a. — D-logio E curves of Eastman Plus X Panchromatic negative No. 



1231. 



1.0 2.0 



Relative Log Exposure 



Fig. 7B, — D-logio E curves of Eastman Super XX Panchromatic negative No. 1232. 



12 



Fig. 8. 



4 8 12 



Minutes 

 -Time-gamma curves of Eastman Panchromatic negatives. A, Plus X No. 1231; 

 B, Background X No. 1230; C, Super XX No. 1232. 



wedge spectrograms for both daylight and tungsten exposure are given, the latter being 

 affected by the greater proportion of red and yellow light. For the duplicating and 

 positive materials, since they are required to reproduce only half tones, the color 

 sensitivity is confined to a relatively narrow band. 



