importing cameras

basically what I am doing is tracking a
plate in nuke and then importing the camera from nuke into unreal engine, once
the camera is in unreal engine I attach it to a image plate but for some reason
it always seems a little squeezed horizontal , I can go into the settings for
the camera in unreal and change it to a 16 : 9 but then all the objects that
were tracked in nuke or objects that I need to put in the scene will be out of
place so is there any way I can get the correct camera settings to come out of
Maya or nuke and have them proper in unreal engine