Due to the need for such compromise there are scenes where a feather schedule can give good results for AB for example but BC is bad. On changing to another schedule the reverse would be true. Since in printer #1 both feathers must work on the same schedule, the best that can be done is to select the least disturbing condition. More frequently, however, no schedule yields good results because of encroachment on the feather of camera vignetting.

    In some scenes where very serious camera errors had occurred as in the underwater sequences in the first submarine roll, an attempt was made to use false schedules in which the feather would be printed deeper into the picture allowing the picture to be mismatched by a corresponding amount. Here it was found that the sequence would open with a very heavy black line and close with a pronounced white line as expected requiring violent mirror adjustments. The effect is too disturbing to use in the picture. The same effect could be expected if attempts were made to correct for slight picture matching errors.

    The motion of whole panels and disruption of the feather character would seem to make it inadvisable to attempt picture mismatch correction by means of false schedules in the printer for any but very rare instances. This only points up the fact that the camera must be right, the printer must not be used as a corrective device. The only means of "correction" available to it are merely expedients which of necessity introduce other types of errors. In certain cases an optical printer can make satisfactory corrections in a dupe negative.


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