I make research on transportation systems. I'm going to use a Dji Phantom 4 Advanced in order to take videos from above and then I will georeference multiple frames. Should I take into account the ''fisheye effect''? Does the specific UAV produce this effect?
The tech specs say it features a 24mm equiv. lens - it does not mention "fish eye" anywhere, and since fish-eye lenses usually are ultrawide (around 16mm), this also seems to indicate a rectilinear lens.
This random test footage seems to indicate that it does not have a fisheye lens, too.
You may have to take into account light distortions - however, you will have to do that with all lenses that are not industrial-grade aerial lenses.