Using HookUpz Smartphone Adapters With Multiple Camera Phones:
For Apple iPhone X users, only digitally zoom after you lock the focus and exposure (hold finger on screen on center of image viewed through optic until yellow box ‘AE/AF LOCK’ is displayed). This will prevent software confusion on some iOS versions between the two cameras, which otherwise may cause a black screen effect when digitally zooming.
For all Apple dual camera phones (iPhone X/8+/7+), align adapter to the 1x wide-angle camera, which is the one nearest the corner.
For Android dual camera phones, align adapter to the primary camera. For specific phone guidelines, see below.