Hi Larry,
i have done some testing: HP5 exposed at 400, developed in Rodinal 1+50 standing (une hour, one inversione at 30 minutes)
It was my intention to have some grain... and i've got plenty!
then i used my nikon d600 with the bellows, a 50mm nikkor, the slide/film holder and a SB-700 flash in TTL mode.
i had to apply a +1,3 stop correction, and then the histogram was even and spread all across in lightroom (tehtered)
Using lightroom in tethered mode is fantastic!
i inverted the negative in lightroom as per your suggestions. Too bad that lightroom does not have an Invert command!
I think that i'll use more 35mm. film, now, i scanned a whole roll in a few minutes and the focusing was very good, while the tonal range was not bad at all.
i'll attach some photos...
thanks!
paolo