Well, I think this has to be the dumbest snake oil nonsense product I’ve seen so far this year. Being sold by the “Ding ding dong crazybtplay Store” on AliExpress, these masks claim to turn your Ricoh GR into a Hasselblad XPan.
Of course, the claim is ridiculous. But, the product aims to let you see and shoot ultra-wide format panoramic images with your Ricoh GR, GR II or GR III. It does this by placing a mask over your lens, essentially cropping at the point of capture.