Originally Posted by
Peter Gomena
Ektachrome duplicating film was used to duplicate transparencies. You can use the sheet form to contact print originals or enlarge smaller transparencies onto it. It is a tungsten-balanced film, not a daylight film, hence the need for the warm filters to use it in daylight. Architectural photographers sometimes would use it as a camera film in high-contrast situations precisely because of its low contrast. It is low in contrast because duplicating always increases contrast a little.
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