I am using lightroom 5
You need Lightroom 6.0 or Lightroom CC 2015 for the files to be accessible in Lightroom.
You can go ahead and upgrade your Lightroom application.
For camera supported in Lightroom : Cameras supported by Camera Raw
You may download DNG converter and convert the files in order to access them in Lightroom.
Click on the below link to download DNG converter:
Hope this helps.