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Fred Newman |
9:28 23 Jan 08 |
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Philippe Bedfert |
10:08 28 Aug 07 |
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David Jade |
23:51 28 Aug 07 |
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Philippe Bedfert |
23:05 29 Aug 07 |
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Shannon Stoney |
15:03 20 Apr 07 |
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Steve Nicholls |
19:03 20 Apr 07 |
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Ben Wilbur |
16:16 21 Apr 07 |
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Jorge Gasteazoro. |
21:55 21 Apr 07 |
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Ben Wilbur |
14:53 23 Apr 07 |
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Re: bellows contraction factor? |
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Shannon Stoney |
16:10 23 Apr 07 |
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Sorry to be late in responding. I appreciate the comments and help. I am still trying to nail down the source of the problem.
I understand now why there can't be a bellows contraction factor.
I did my own testing. The curves are working fine with the 150mm lens. I ran another test yesterday just to make sure; still haven't plotted those curves yet, but since negatives with the 150mm lens are working fine, I doubt that the problem is faulty testing.
I suspect right now that the problem is that the lens apertures might not be accurate. I am going to see if I can get that checked tomorrow.
Please be patient with me.
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