I bought a used Canon 70-200mm from a forum about a week ago. It was an attractive deal as the previous owner had been using the lens on an A7ii (as I would be) so it came with a Canon to e mount adapter which I knew from the sellers description it was not going to be a Metabones, rather just one of the cheaper alternatives, Xcsource as it happens. A few days later I went to Chatsworth House with the family for a day and took the lens for it's first outing, and here is the strange bit. It was a very bright sunny day but had left the lens hood at home by mistake. As I was taking pictures I could see flaring under certain angles which as you'll see in the image below. This one has a band running along the length of the image near the bottom. When I got back home I tried repeated shots using the lens hood and without - it didn't really make much difference. I did also take a 30 sec exposure at f4 max iso to test and see if there is light leaking from either the mount or adapter, which there isn't. From reading online the possible cause could be reflected light internally in the adapter, which is something I'm going to look into. Anybody with experience using this adapter or lens or indeed any comment would be appreciated!