/usr/share/man/man8/mount.ntfs.8.gz is in ntfs-3g 1:2014.2.15AR.2-1+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man8/ntfs-3g.8.gz
/usr/share/man/man8/ntfs-3g.8.gz