If you like me already own the Sony A7rV and want to use it with Lightroom (no official support yet), here is a small “Hack” to convert the RAW files. Sparris on Dpreview forum wrote:
Magic Wedding Photographer on Youtube has found a workaround to convert the raw files from Sony A7R V so they can be opened with Lightroom and Camera Raw! I just tested it and it works. I suppose it rewrites the header of the file to the one found in A7R IV.
Download Exiftool from https://exiftool.org/ and use the command line in Windows:
“exiftool -sonymodelid=”ILCE-7RM4″ -ext ARW -r” followed by the file name, for example
exiftool -sonymodelid=”ILCE-7RM4″ -ext ARW -r 011.arw
if 011.arw is in the same folder as exiftool.exe