Lightroom lens correction

[Daryl5D13]

Been using Lightroom on my iPad to edit photos. The lens correction works fine when I edit photos shot on my Sony with 50mm (Sony lens). However I recently tried a new lens (ttartisan 27mm). When I select lens correction to remove some vignetting, nothing happens. I shot in raw as usual too. Any fixes?

Thanks!

[Charlie.D]

I am not sure that lens make is included in the set of lenses officially supported by Camera Raw: https://helpx.adobe.com/camera-raw/kb/supported-lenses.html 

Note: even with certain supported lenses sometimes the effect of applying lens correction is subtle.