It took me a while to figure out how to make the cameras from C4D work on Maya. Everythg that comes from C4D is HUGE, and it doesnt matter to change the scale when u're importing, its always the same. So I've tried to create 2 empty groups, inside one of them I put the animated camera from C4D (it automatically gets baked when exporting to fbx) and inside the other one I put the obj from C4D, to be used as a reference (as its almost impossible to simply bake mograph stuff). Then, I just scaled down both the groups and "Ta-daaaaaa" (heahheah) it worked perfectly!!!
On the opposite direction (from Maya to C4D), things work in a similar way if u export the scene to fbx. The only thg I've noticed is that if you do not check the option box for "baking animation" (inside the animation + tab) on Maya Fbx export window, C4D does not understand the animation data. And back to C4D, stuff from Maya works great! =D