At Vuescan, I have used the "Advanced Workflow" (locking RGB exposure &
film base color by scanning clear leader) for negative and got very
good and consistent result. I am able to use the same exposure for all
frames in a roll, no matter how different the shots are in terms of
tone and exposure.
But when I use the same exposure to scan a roll of E6 slides with very
different tones & exposure (night shots vs day), while the day shots
look fine, it seems that the RAW histogram stays on the very low end
for the night shots. It seems to be begging for higher hardware
exposure, in order to capture the shadow detail better with less noise.
On the other hand, by judging with the preview window, I didn't see a
clear difference in quality between the original exposure setting and
after I hae increased the exposure. I still see more or less the same
amount of shadow details in both previews.
Here is my question:
1) For slide film, is it better to simply go with auto exposure and let
Vuescan decide the optimal exposure for each frame? I simply want a
straight-forward workflow to scan as RAW for later manipulation.
Monitoring and tweaking the exposure for each frame is tedious. What do
I miss by using auto exposure?
2) OR??? It is OK to use the advanced workflow for slides. Simply trust
the locked exposure setting and let the dynamic range of the scanner
cover the shadow detail.
Any insight will be much appreciated.
thanks,
Jack
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