Vuescan again, "GENERIC" vs "Tmax" profiles
As always, a problem figuring out VueScan that's probably been asked, but I figured I'd ask after spending a couple hours looking at decades old photo.net posts...
Scanner is Nikon LS-4000. Film is TMY2 that looks a little thin to my eyes, but does have detail in the shadows. (shot 6 years ago, possibly at box speed)
Normally I use the lock exposure technique (though sometimes that gives me values near 30), set color to NONE, curve at .25/.75 (straight curve), and 'GENERIC COLOR' for the film profile. I turn on the 'pixel colors' tickbox to see what is in gamut.
The last roll I just scanned, almost everything in shadow was being clipped with the histogram far to the left. Switched to the default TMax D76 CI-.40, and everything was showing up, albeit with a fairly narrow histogram.
Perhaps its worth mentioning that this difference was looking at a preview scan—in the app without any change in exposure.
What gives here? From what I've seen from the numerous tutorials and the like, the standard advice is leave it on 'none' and generic, with a few suggesting auto levels.