cmacd123
Subscriber
As well or in more detail there are three perforation families, (but still simplistically!).
- cine camera for frame to frame registration
- distribution print for wear tolerance
- stills though (my) stills cameras will tolerate cine cameras B&H perfs.
And ECN uses a different CDn from C41 so they would be 'crossed' processed.
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There is a whole history about how the various perforations came to be over the years. much having to do with the character of Nitrate film.
Not wanting to go too far in this off-topic sub-thread, but Movie Camera negative has BH1866 perfs while Both still camera film, and movie print film has KS1870 perfs. The slight difference in perforation pitch allows contact prints to be made while the film is run around a drum, and compensates for the amount that Nitrate film used to shrink in processing.
The main reason that ECN-2 and C-41 were different was probably that Kodak wanted to keep the lines separate, and with the rem-jet backing being so useful for movie film, having different processes removed any need to adjust formulas for movies to suit the mass market. There were even special movie products line CRI Color Reversal Intermediate, (the product that messed up the restoration of Star-Wars) that had their special process.
Using E-6 stock for movie film was a quick fix when the last Movie Reversal film, EASTMAN Video News Film finally went away, after being kept on life support for years by the Crash Test Labs who used it in High speed cameras to film crash tests. A use that went away when Regulations forced a switch to high speed digital cameras.
Kodak did have to make unspecified changes to first Ektachome 64T and later ektachrome 100D to get it to run smoothly in a Super 8 Cartridge. I don't think that VNF was ever sold as super 8 but at that time Kodachrome was still available. I guess that they had to use an antistatic treatment like that on current ECP Print film. My fingers are crossed that Ferrania will not have that problem with their Super8.