ok, back to the clouds

The first two shots are taken without a polarizing filter where as this and the next two are I don't know why I am getting these dark patches
But it is either the fact that it is a cheap ( bought in Hong Kong ) filter or something to do with the plastic window on the inside of the plane combined with the thick glass window, or maybe a combination of the two
so back to no filter
now I also mixed these shots up, some are taken with the G10 and some with Eos MK 2, can you spot the difference ? Deutschland coming close to Cologne ( Koln )