--- Shannon Stoney <shannonstoney@earthlink.net> wrote:
> Hi. I have two reciprocity failure charts. One is from Kodak and the other
> is from Steve Simmons' book, Using the View Camera. They give very
> different adjusted times for Tri X, when you get to very long exposures.
> For example, if the metered time is 30 seconds, Kodak says to expose for 200
> seconds, and Simmons says 290, almost half again as long. Also, the
> adjusted development percentages are very different. Kodak says 10% off
> even for an adjusted exposure of only 2 seconds, and 20% off if your
> adjusted exposure is 50 seconds, whereas Simmons doesn't even begin to
> decrease development until exposure reaches 13 seconds, and then only by 5%.
> If exposure is 50 seconds, he says to reduce development by about 9%. This
> is confusing. I wonder whose numbers are right?
You can find out by testing. The developer you use may well make a difference,
so test with the developer you plan to use.
Cheers -
george
=====
Handmade Photographic Images - http://GLSmyth.com
DRiP Investing - http://DRiPInvesting.org
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Received on Thu Aug 8 07:37:14 2002
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