Kodak Portra 160 long exposures

A couple of tests shots I've made with Kodak Portra 160 film, trying to determine reciprocity corrections for long exposure.


Meter showed 30 seconds at f/16.


 

Meter showed 20 seconds at f/16.

Basically, a 1.5x to 2x from the metered exposure seems to work fine. Even a 3x reciprocity correction seemed fine without blowing the highlights, which was a pleasant surprise!!


Images shot with a Leica M6 and Leica Elmarit 28mm f/2.8 lens, using a URTH ND1000 (10 Stop) filter.



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