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Hans -- • I don't think the Personal Reference Speed Point feature had been included in version 1.1.0.7. Contact Dennis or Fred at for an upgrade to the latest version. • You can find your paper's ES value in the Plotter. Enter your paper test data to produce the family of paper curves, then select the individual curves under the "Analyze" tab and you'll see the ES value of each curve displayed between Emin and Emax on the x-axis of the graph. Decide which curve you want to use, then enter its ES value in the Paper ES field in the Options window (under the View menu item). That ES value will remain effective until you change it, and will be automatically applied to your new film families as you create them. • You can also enter the ES value in the Paper ES field in Analyze or Chart windows in the Plotter but those changed values are effective only during the current session. When you Exit and restart, or when you create a new file, the ES value will revert to the value in the Options window. However, files saved with a local ES value will retain that value when they're reopened. * When you have the new Plotter you'll find the Personal Reference Speed Point field in the Options window with the default value of 2.4. I'd suggest using one of the "honestly-rated" film/dev combinations I've mentioned here before (TMY in DDX+6 or TMRMS+7 or Xtol+1; or TMX - DDX+6; or HP5 in DDX+6; or FP4 in DDX+6; or Delta100 in Xtol+1 or D-76+1) to calibrate your test setup. Run a 3-sheet test first, using times of 4, 8, and 16 minutes, and see where the Plotter finds the speed point. If it indicates 2.4 you're OK. If it indicates some other value, calculate the necessary exposure change and run another test. For example, if the Plotter finds your test speed point at 2.24 and you'd like it to be 2.4, the necessary exposure change is 2.4-2.24=0.16 or about 1/2 stop. In this case increase the test exposure by 1/2 stop and proceed. If the test had indicated 2.57 the exposure change would be 2.4-2.57= -0.17 or about -1/2 stop, indicating a decrease in the test exposure. |
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