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It works and the image is pretty clear. However the one I received only had a protective film on one side of the glass piece so the other side is really scratched up. Annoyed because I had to wait over a week for shipment.
I received this yesterday and was excited to try it. The mask was supposed to be on both sides but only one side and the other side had a sticker on it that was stuck to the plate and I had a difficult time getting it off. Unfortunately it marked it up and blurs a place on the plate and on the canvas. It seems over priced.