Im using Fspy to match the camera of diferent photos.
More of the time I just model the geometry in blender and just export the model, but some times I need to export camera an base geometry to 3ds max to render the same camera angle, and when I import it is completely different. I copy same values as focal lenght, film with and shit x and y, but the result is totally diferent. In cases with out shift is posible to play with the focal lenght paramenter and some times its posible to match it.
If anyone can help with this or know a proper workflow ill really apreciate it.