Greetings(posted 8279 days ago)Yesterday I read a very interesting article from a different site on how to calibrate black and white negatives to find a new E.I.
I have tried emailing the author and publisher, but I haven't received any response back yet from him, so I'm thinking maybe I could ask here?
This particular lesson describes to use hot lights as the main light source for measuring an 18% gray card. I have a novatron set and was wondering if incident readings could be made on all 4 corners, and center, of the gray card to determine the light exposure? The reason is, I'm using my hassy to do the tests with, using Plus X pan pro, and there is no reflective meter in the prismfinder. Can incident be substituted for a reflective meter under this circumstance? I was thinking of performing the test outdoors, but that could lead to inconsistencies in case of a cloud cover or change in the daylight itself.
In this lesson, it was also recommending the use of a terry cloth that should resemble in tone with the gray card, I don't understand why I need this if I have a gray card standard?
The test is performed by making an exposure with the cap on for film+fog, then the gray card on frame one, then after this, the stepwise exposures showing a portion of the gray card and a black background. I have also realized that this test requires 13 frames to be used for the test, hassy has only 12 frames and I don't want to waste a second roll for only one extra exposure. Could I use the film rebates as means for determining film+fog instead? One site seemed ill-advised and against this method because of the film edges being darker than an actual blank frame.
If anyone would know if what I mentioned above is possible with the metering and other stuff would be doable, please let me know.
Thanks for all your time.
RJ