Lightroom 5 does not recognize the raw files from X-T10. I have lightroom version 5.7 on windows 10 and it does not support the raf file. One work around I found online is to change the header on the raw file from X-T10 to X-T1. Lightroom 5.7 supports the raw files from X-T1. I use exiftool (http://www.sno.phy.queensu.ca/~phil/exiftool/) to change it and I created a batch file that I just double-click, it saves me from opening command prompt and typing the command as the tool does not have a gui.
I copy the exe and bat files in the folder containing the raw files and double click the batch file.
exiftool -Model="X-T1" *.RAF
Will convert all of the raf files and create an original copy.
