OPPO Find X7 Ultra goes official with world’s-first dual periscope zoom lenses, but with a catch

Oppo’s latest flagship, the Find X7 Ultra, is the first smartphone in the world to include two periscope cameras.  Going straight to the periscope cameras, one periscope lens has a 3x magnification and features a 1/1.56-inch sensor, which OPPO claims is “the biggest telephoto sensor in any smartphone.” Large sensors often produce better low-light photos…