CHAPTER XXIII 



MOTION -PICTURE PHOTOGRAPHY 



By Carl Dreher 



Introduction.— This chapter is limited to a description of black-and-white pro- 

 fessional motion-picture photography as practiced in the United States. Aside from 

 some design differences the same principles govern the art abroad, and since American 

 practice is generally regarded as occupying a leading place, it has not been judged 

 necessary to include data on such national peculiarities as exist. 



Pic+ure 

 Camera 



-§^S^r?OL^^\ Sound 

 Recorder 



^-Picture Sounc/,-'' 



negfctHve negaf/ve 



Pic+,ure 

 Pr'm\ier 



Picfure 



SouincJ 

 Prin +er 



P/c^ure 

 nega-f-ive 



£ 



Sound 

 negaHve 

 L 



Pic+ure 

 Projector 



Picture 



Clombineid J 



Pi{c+ure cjirjiol 

 iSounoJ 

 IPrin+er 



Sound 

 ^'' prinf 



Sound 

 Projec+or 



/'Sound 

 I nega+ive 

 ■* ► 



• Composite p/c^ure 

 and sound prinf 



Pic+lure 



Soumd 



Combined 

 picture and 

 sound 

 projector 



Fig. 1. — Correlation of picture and sound. 



Another limitation excludes the treatment of sound recording by photographic 

 methods, but as by far the greater part of professional motion-picture footage is now 

 associated with sound tracks, the correlation of action and sound records will be briefly 

 described here. In some cases, as in certain types of newsreel work and the production 

 of sound pictures in locations where portability of equipment is essential, sound and 

 scene are simultaneously recorded on one film, but the usual practice, illustrated in 



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