Jorge

I have been told by a reliable source from Ilford that to get the correct exposure on FP4 when under reciprocity failure conditions that you multiply the selected exposure time (in seconds) to the power of 1.49. So if you have a decent scientific calculator or an excel spreadsheet why not create your own table


Excel formula =POWER(A2,1.49) where A2 is the time in secs


Phill