Hi Alexey,
Metashape can distinguish different cameras(same model) based on SN information from EXIF tag in the photo, and read pre-calibrated parameters for post-processing.
However, DJI Phantom 4 RTK has a setting whether to turn on lens distortion correction. when this setting is on, the image will not contain any pre-calibrated parameters.
When import a folder with a mixture of two types of photo, the result of current version of Metashape (1.8.1) is that all photos will be considered without pre-calibrated parameters.
Is it possible to classify these two types of photos and consider they are separate photo groups ? please check "dewarpflag" and "dewarpdata" tag from EXIF tag in the attachment. Due to the size limitation, I am not able to upload raw photo, let me know if you need raw photo for testing.
Thanks.