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Messages 571 to 580 of 653 (Total: 653) First | Prev | Next | Last
Subject 
Author 
Date 
Questions andBenefits of Testing 
Robert McColloch  11:00 11 Jan 03 
Re: Questions andBenefits of Testing 
Phil  19:03 11 Jan 03 
Exposure &Development for Portraiture 
Mike Kilkeary  18:42 4 Jan 03 
Re: Exposure &Development for Portraiture 
Phil  18:01 5 Jan 03 
paper testing 
howard schwartz  7:57 2 Jan 03 
Re: paper testing 
Phil  12:07 2 Jan 03 
Re: paper testing 
clay  12:07 6 Jan 03 
It seems that you could put a step wedge in the enlarger and expose as follows:
-1 5
100% 0%
75% 25%
50% 50%
25% 75%
0% 100%

Where the percentage is the percentage of total exposure time. I'd probably pick 20 seconds or some other number that is easy to calculate and adjust the f-stop on the enlarger lens to give the proper exposure for the step wedge. Plotting up the resulting reflection densities ought to give you a pretty decent idea of the relative ES and speed of these combinations and allow you to interpolate for the 'in-between' combinations. Is this too simplistic?

Clay
 
Re: paper testing 
Phil  12:29 6 Jan 03 
Procedure for testing reciprocity failure? 
Michael Mutmansky  7:28 3 Dec 02 
Re: Procedure for testing reciprocity failure? 
Phil  9:27 3 Dec 02 


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