ASUS ZenFone Zoom packs 3x optical zoom into Android

ASUS was gleefully teasing something special for its flagship CES 2015 smartphone, and sure enough it is, with the ASUS ZenFone Zoom squeezing in a 3x optical zoom. The new Android handset has a 5.5-inch Full HD display and runs the latest version, 5.0 Lollipop, but it's the backside which we're most intrigued by, with its 13-megapixel camera and laser …