mid next week I'll have a three day shoot. On one day we will/want to shoot a guy how is sitting in the back and watching the environment he passes, while the car is driving.
we will shoot it with the Blackmagic pocket camera, because it is easy to rig on the outside of the car. I did that some years ago, and it worked fine. However this was a night shot, now we will shoot in daytime so i'm aware of possible reflections (and for sure there will be some). So for me it is not so important to cut all the reflections out, but it is very important to see the guy who is sitting inside and how is view wanders around.
here is an example spot (look for the scenes with the little girl inside the car) https://www.youtube....h?v=vqlaV1SAqGE
Could a Polarizer filter help? And what about putting a black flag on the car window, that reaches over the camera?