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Phil |
18:32 23 Jun 03 |
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Walter Glover |
6:21 24 Jun 03 |
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Phil |
8:20 24 Jun 03 |
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Bill Lester |
8:37 9 Jun 03 |
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Phil |
11:37 9 Jun 03 |
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Jeff White |
5:17 25 May 03 |
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Jorge Gasteazoro |
12:44 26 May 03 |
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Walter Glover |
15:27 2 May 03 |
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Fred Newman |
16:11 2 May 03 |
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Re: A Left Of Field Question |
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Phil |
17:50 2 May 03 |
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Walter --
In a separate email message I'll attach a JPEG file of the "Library" of film curve families from that test series Fred mentioned. The individual diagrams are tiny but I think they'll give you a pretty good idea of the essential features of the families and allow for useful comparison. The columns represent developers; the rows are film types.
There are several characteristics to look for: effective film speed is suggested by the lateral position of the family in the graph space (displacement to the right indicates speed loss); image gradation is symbolized by curve shape (long toes suggest poor shadow contrast, upswept shoulders suggest emphasized highlight contrast); variations of curve shape within a given family indicate that gradation changes as development proceeds; curves that are tightly bunched with little variation in slope indicate restricted development latitude, etc.
By checking both columns and rows you should be able to recognize characteristics that are inherent in the developers as distinct from those inherent in the various film types. It's also fairly easy to identify film/developer combinations that have the most (and least!) favorable characteristics overall.
If you need help interpreting these curve families, let me know. Incidentally all of these test test data (and more) are available for installation in the Expo/Dev program database.
-- Phil
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