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Technical Information Bulletin

Motion Picture Film Speed Ratings

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Updated June 4, 2004

Exposure Indexes (EI) Used to Measure Motion Picture Film Speed

Unlike still photography film, there are no published standards to determine the speed of motion picture film. Motion picture film speed and the suggested filtrations are determined by practical picture tests. Suitable safety factors are included to allow for camera differences, lighting variation, etc. Exposure Index (EI) values do not express the absolute film speed or sensitivity, and should not be regarded as fixed values. Because EI values are not fixed, they can be changed if repeated testing indicates the need for a change.

For more information, see:
ISO vs. EI Speed Ratings for KODAK Films
KODAK 35 mm Print Film Chooser
KODAK ADVANTIX Print Film Chooser

Kodak and Advantix are trademarks of Eastman Kodak Company.
Technical Information Bulletins provide information of limited or specific application. Responsibility for judging the applicability of the information for a specific use rests with the end user.