Reciprocy failure of Portra 400 NC

[schlger]

Did anybody test the peciprocy failure of Portra 400 NC or of the other Portras?

Thanks a lot!

 

[schlger]

Did anybody test the peciprocy failure of Portra 400 NC or of the other Portras?

Just to correct the typo:

Did anybody test the reciprocy failure of Portra 400 NC or the other Portras?

 

[MartinP]

reciprocity

 

[frotog]

Past ten seconds and up to one minute, double the time.

 

[nworth]

The above information is probably a good working guideline. Kodak is cagey, telling you to make tests for exposure times over 1 second - http://www.kodak.com/global/en/professional/support/techPubs/e4040/e4040.pdf