-v^ 



:^^ 



10- 



20- 



30- 



^ 40h 



in 



< 



a: 



H 



50h 



60- 





1 





X / 



/ 

 ^ ■ 



I 



/ 



I 



V 



440 



X' 



525 



70- 



80- 



^ A r 



NO. 47 FILTER 

 NO. 58 FILTER 



NO. 25 FILTER 



901- 



400 



500 



FREQUENCY IN m/J 



600 



700 



FIG. 16 TRANSMISSION CHARACTERISTICS OF KODAK WRATTEN FILTERS 



41 



