I finally did a test of the new Kodak Ektachrome 100 on an astro target.
by Stephen Migol, on Flickr
Exposure: 20 minutes
Lens: Stellarvue SV70 ED (420mm at f6)
Reducer/Flattener: William Optics .8
Filter: IDAS LPS-D1
Location, 2000 feet above Silicon Valley at the Montebello Open Space preserve, no marine layer, barely any milky way visible. Not a "dark site"