Re: [pinhole-discussion] Type 55 reciprocity adjustments

[Chris Peregoy]

In his book, "Polaroid Land Photography", By Ansel Adams from 1978 he 
states that;
an indicated time of 8 sec should be 16 sec (2X)
an indicated time of 16 sec should be 40 sec (2.5x)
an indicated time of 32 sec should be 96 sec (3x)
an indicated time of 64 sec should be 256 sec (4x)


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Chris Peregoy | http://www.gl.umbc.edu/~peregoy | http://imda.umbc.edu/