I use 12 mm and 25 mm on X5S - 4k 3840x2160 - Prores 422hq.
The profile is ok on app. The image on the screen is ok but when i look to my file the horizon is like on a gopro.
Gael, can you please show us a short clip for further support? If it is OK, please upload to Dropbox or Google Drive and post the link here, thank you very much.
Ok i understood that in prores no profile for distortion is applied. Only on H264. As I fly a lot with 45 mm, it’s very curious to see that with the 12 mm... I will fix that in post.