Portra 160 + 400 NC reciprocity

Hi Guys,

Just wondering if anybody on the board has values for reciprocity for Portra 160/400 NC.

I'm shooting on 10x8 and don't really want to go through a series of tests to determine some values!

Maybe somebody has experience of the film/done some testing?
Cheers
Dave

See http://www.kodak.com/global/en/professional/support/techPubs/e4040/e4040US.pdf

Kodak says no correction is needed for exposures from 1 second to 1/10000 second. My experience is that the range is even broader than that on the long exposure side. I don't have any exact data, but it seems to handle a lot like TMY.