Ektachrome Duplicating (EDUPE) ISO?

[tadas]

The headings say this is where questions about film rating should go, so here goes:

What ISO should I shoot Ektachrome EDUPE film? Google searches suggest anything from ISO 4 to 16. I've seen Kodak references that say ISO doesn't apply, which is ridiculous -- if there's an amount of light on a subject, if it needs 1/30th at f4 at ISO 25, then it needs 1/30th at f2.8 at ISO 12, 1/30th at f2.0 at ISO 6, and 1/30th at f1.4 at ISO 3. Where does EDUPE fit here -- there is an exposure that is right...

[LarryD]

ISO 6 and ISO does not apply as it is designed to be shot with filter packs so it can match the film being copied. Also it is not daylight but is Tungsten balanced. Though the film comes with filter pack recommendations for other light sources the lab may be using.

[Tom Hildreth]

And you'll be duplicating slides at f11-f16 (I found these to be the widest acceptable f-stops for this purpose) or f22 (better) or f32 (bestest yet).

[LarryD]

BUT. If you were to shoot it daylight in a camera for fun then you may want to check the package you have and use the ISO printed in the little box with the filter pack as a starting point. I find it is fun to shoot and then process C-41. I use ISO 12 for that.

[tadas]

BUT. If you were to shoot it daylight in a camera for fun then you may want to check the package you have and use the ISO printed in the little box with the filter pack as a starting point. I find it is fun to shoot and then process C-41. I use ISO 12 for that.

Larry, you're onto what I want to accomplish, but I want to keep it E-6. Should I use ISO 12 with an adjustment for the warming filter (I'd judge it at ISO 8 for an 81A filter)?

What I'm trying to get at is the differing quality you get with slow film speed. I'm old enough to remember when ASA 100 film was "high speed", not the slowest film available without special ordering, and when 1/1000 at f16 was not a setting normally encountered....

[LarryD]

I would bracket it from 3-25 just for fun with and without the filter if being processed E6.