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Luigi Pasto |
19:07 28 May 13 |
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David Jade |
19:14 28 May 13 |
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Luigi Pasto |
19:18 28 May 13 |
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Elliot |
15:09 16 Feb 13 |
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shannon stoney |
8:09 31 Jan 13 |
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Philippe Bachelier |
15:22 17 Feb 13 |
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shannon |
13:44 2 Jan 13 |
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Brian |
12:44 18 Mar 12 |
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Brian Edwards |
16:50 18 Mar 12 |
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Using a point light source |
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Dr. Elliot Puritz |
16:09 26 Feb 12 |
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I have a considerable number of film curves done with 4x5 sheet film and drawn on plotter assuming that a diffusion light source is used. I have tested my commonly used papers as well, but testing on a step wedge with a diffusion light source. I am curious: Can the same film data be used BUT the parameters in plotter changed so that plotter can furnish reliable exposure and development information for a POINT source ( condenser head )in ExpoDev? Of course, the film has to be developed to a certain ES...so, the same question obtains regarding the paper-or will the ES values be so different that the data used for a diffusion head will be unusable? I will pose the same questions on a few other forums. Thanks for helping.
Incidentally, does anyone think that enlarments made with a condenser enlarger ( 4x5 to 8x10 or 11x14-most often the former ) are any "better ( sharper, more contrasty, anything!? ) then those made with the more usual diffusion enlarger?
Unfortunately...little action on the BTZS site....oh well.
Elliot
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