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Mike Donnelly |
18:00 21 Apr 04 |
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Phil Davis |
6:41 22 Apr 04 |
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Fred Newman |
13:48 28 Apr 04 |
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Victor |
18:25 29 Jan 04 |
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Phil Davis |
17:48 8 Feb 04 |
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Jorge Gasteazoro |
7:35 16 Jan 04 |
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Re: EFS, Why is it different? |
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Phil Davis |
11:08 16 Jan 04 |
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Jorge --
I don't think there's any real conflict in your metering comparisons. Expo/Dev is indicating the film speed that's appropriate for the 7-stop SBR (the full 400 speed is appropriate for an average gradient of 0.62 which may or may not be the same thing, depending on your ES value. If you're using an ES of 1.4 for platinum, for example, a gradient of 0.62 is equivalent to an SBR of 7.5 stops). Expo/Dev is also including some compensation for reciprocity so the increase from 1 second to 1.2 seconds is not surprising.
If you're going to use Expo/Dev (and I recommend it) you can forget the "doubled film speed" adjustment; it applies ONLY when you are relying on the INCIDENT (not spot) meter readings themselves and following the Plotter charts for EFS and development data.
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Jorge Gasteazoro |
11:42 16 Jan 04 |
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Robert S. Sfeir |
4:04 2 Dec 03 |
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Phil Davis |
7:20 2 Dec 03 |
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