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Jorge Gasteazoro |
20:46 22 Sep 05 |
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Miles Nelson |
22:25 24 Apr 05 |
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Phil Davis |
8:09 25 Apr 05 |
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Miles Nelson |
13:31 25 Apr 05 |
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Miles Nelson |
19:53 25 Apr 05 |
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Phil Davis |
7:15 26 Apr 05 |
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Miles Nelson |
9:59 30 Apr 05 |
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Re: personal reference speed point data |
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Phil Davis |
16:58 30 Apr 05 |
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Miles --
I'm happy to hear that your new data are wroking well; that's what the testing procedures are supposed to accomplish.
The 7-stop EFS value is rarely the same as the film's ISO number because the ISO is derived from a film curve whose average gradient is about 0.62. To find out how closely your test "ISO" matches the official one, check the EFS/G chart at the 0.62 level.
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Miles Nelson |
18:38 30 Apr 05 |
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Miles Nelson |
6:56 23 Apr 05 |
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