Hi folks.. Once more I return to the font of all knowledge:
I need to make some 4x5 internegs of my favorite 67 shots (having actually
LOST my #1 ever bw shot when i moved).. I'm getting going on this project on
Monday\Tuesday (eek)...
I'm picking up PROFESSIONAL B/W Duplicating Film SO-132 for the job, but i'm
a little confused by the process to use to actually GET the exposure. The
Kodak site quoteth:
EXPOSURE
You can use tungsten, fluorescent, or tungsten-halogen light sources to
expose this film.
Make a series of test exposures under your conditions.
Start with a trial exposure of 40 seconds if you use a tungsten light
source that
provides 5 footcandles (54 lux) at the exposure plane.
More exposure produces lower densities in the duplicate;
less exposure produces higher densities.
Now - I plan to use my Saunders LPL to project the negative onto the film
(which will be flattened on my vacuum easel), and development will be no
issue.
QUESTIONs:...
How in HECKS name can I calculate "5 footcandles (54 lux)"... what f-stop is
this? I can measure light using my Sekonic 501...
Looking at the curves, I'm going for density of 1 with 20 second exposure
(20 lux seconds)... Is this correct, or have I got it wrong?
http://www.kodak.com/cluster/global/en/professional/support/techPubs/f11/f00
9_0149ac.gif
Thanks, Oliver
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