That camera requires Lightroom 6.9/CC 2015.9 or newer. Lightroom 5 will only convert to DNG if it already supports the raw files natively. You have to download the standalone DNG converter and convert the raw files first using it, and then import those into Lightroom 5.
Do you have a link for the DNG converter you can point me to
Sent from my iPhone, please excuse typos...
The camera model you are referring to was first supported by
Adobe Camera Raw 9.9.
Lightroom CC (new) 1.0.
Lightroom CC 2015.9.
Lightroom 6.9 (perpetual version)
Your options are as follows.
1. Upgrade to Lightroom Creative Cloud with LR CC 1.3.1 (current version) or Lightroom Classic CC 7.3.1. (subscription versions)
2. Upgrade to Lightroom 6.14 (latest version) of Lightroom 6 perpetual version.
3. Utilize the free Adobe DNG Converter version 10.3 (the latest version) to convert your camera's raw files to dng format which will allow you to import the dng files with your existing version of Lightroom 5.7.
See the screen capture.
Be aware that LR 5 was released in June 2013 and the last update was Dec 2014. Quite outdated in terms of raw processing technology so you may wish to consider the options carefully.