By Sophie Knight and Reiji Murai TOKYO (Reuters) – Panasonic Corp and Japans other mid-tier camera makers have a battle on their hands to win over a smartphone selfie generation to mirrorless cameras that held such promise when they were launched around five years ago. Panasonic, like peers Fujifilm Holdings and Olympus Corp, has been losing money on its cameras since mobile phones that take high-quality photos ate into the compact camera business.