I have Lightroom 6 and wonder if it supports the Samyang/Rokinon 14mm. I need to know if the correction for the mustache distotion is in the software already or if I need to enter it. If I need to enter it where do I find the information. I have an iMac OS X Yosemite.
These lens are not supported in Lightroom 6
You can check in the list of supported lens here : https://helpx.adobe.com/x-productkb/multi/lens-profile-support.html#main_List_of_supported _lenses
and there is no such predefined preset for moustache distortion correction in Lightroom.