I finally got around to testing Kodak's new Ektar 100 color negative film.
My test incorporated a 50mm lens set at f/2.8 and a 30 minute exposure. I shot the darkest part of the sky, directly overhead in the constellation Cygnus. This area has enough hydrogen Alpha to test this films sensitivity to emission nebulae.
30 minutes is a long time for f/2.8, but this result is in line with other 100 speed films in the reciprocity category.
This image still shows a little green cast that was present in the original scan. I adjusted green levels to rid most of it, so it is possible to use this film for astrophotography.
I hope this satisfies any curiosity others may have about this film.