repleo wrote:
If you are thinking of trying to shoot from a coach in Europe, be aware that a lot of coaches there have that perforated film that looks reasonably transparent from the inside but reads as a advertisement or banner from the outside to cut down on heat gain. I haven't tried to shoot through it, but I suspect it could effect auto focus and would significantly reduce the light coming through. Other posters have complained of a polarizing film on the glass.
That stuff makes it impossible to shoot through. No sense even trying.