Now I do not know this answer does LR read the shooting settings in RAW or is it like Nikon where they encrypt their data except the basics. I ask this because these were all shot in raw with 0 in camera corrections and NR set to low. What I don't know is if Fuji applies some NR and LR can read it in the file. So take when I say there is no Post Processing that is from me manipulating in LR not what Fuji does.
I used a black subject(my favorite Super Zoom the Super Nikon P900) and a fairly solid dark color in the background. Now these are in fair light as you can see I can hand hold at ISO 800 but that is still 1/15 and the exposure is good but it seems if exposed ok the x100s can really do high ISO. It can expand but the hi and low settings are JPEG only and I know Fuji would add some seasoning to the JPEG so I wanted a RAW evaluation.
All where shot at f8 and hand held.
ISO 800 f8 1/15
_DSF1249.jpg 135.66KB 0 downloads
ISO 1600 f8 1/32
_DSF1250.jpg 144.04KB 0 downloads
ISO 3200 f8 1/70
_DSF1251.jpg 160.51KB 0 downloads
ISO 6400 f8 1/150
_DSF1252.jpg 184.21KB 0 downloads