Graduated filters (PYSICAL, not in post processing)

The picture has to be shot with a PHYSICAL graduated filter, so not a gradient added in PP Personally I tried it for the first time last week (and took the sample entry ;) ) and was completely blown away by the results. Immediately I bought a set for myself and it's fantastic. People seem to be under the impression that you could do this in post-processing but to keep the real colors of the sky this works a million times better. (And no, I don't have any stocks in the graduated filter market)