No, the Galaxy S20 Ultra won't have 10x optical zoom, here's why - Android

TL;DR

Galaxy S20 Ultra won't have the 10x pure optical zoom level bandied about, because:

Samsung's periscope zoom module suppliers Optrontec and Actro are shipping prisms for a 5x optical zoom kit;Samsung has only announced a 5x optical zoom periscope module so far;Ming-Chi Kuo has stated that the first phone with 10x periscope zoom won't be in the S20 series but rather the Huawei P40 Pro.