OPPO announces dual-cam 5x optical zoom technology for smartphones: Digital Photography Review
Continuous zoom to make a come back in smartphone cameras?
Amazon.com : PRO CAPTIVATE HD Zoom Monocular Telescope for Smartphone - 10-30x 42mm High Power Monocular for Hunting with Tripod - BAK4 Prism Handheld Monoculars for Adults - Bird Watching Gifts : Electronics
Apexel Hd 60x Phone Camera Lens Telescope Lens Super Telephoto Zoom Monocular + Extendable Tripod With Remote For All Smartphone - Mobile Phone Lens - AliExpress
Don't believe what smartphone manufacturers tell you about zoom
Lenovo announces Hasselblad True Zoom camera module for Moto Z smartphones: Digital Photography Review
Oppo's 10x optical zoom technology is coming to a phone in Q2 2019 | Mashable
Amazon.com: Cell Phone Camera Lens, SEVENKA 12X Telephoto Universal Clip On hd Lens Compatible with iPhone 12/11 Pro Max X XS Max XR/8/7/6/6s, Samsung, Android and Smartphone with Travel Case : Cell
Iterating on zoom: smartphone approaches through the years...