A quick google search told me that this happens sometimes when new cameras are released. Do I need to wait for a LR update? Will it work eventually? Do I need a newer version of LR? I checked for updates but there weren't any available.
You need to purchase Lightroom 6.5 or Lightroom CC 2015.5.
A free alternative is to get the Adobe DNG Converter version 9.5 and use that to convert your RAW photos to DNG, which can then be imported into Lightroom 4.
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