Review on High Power 12x50 Handheld Monocular Telescope: Waterproof, Portable Scope for Smartphone with Universal Adapter & Stable Tripod - Ideal for Hunting, Birding, and Travel by Peter Nobles

This is the second test purchase and this one is much better. The monocular works as expected but what attracted me in this case is the monocular adapter cap that fits snugly on the phone so it will most likely come off and your phone will fall to the ground. The only small problem is that the monocular eyepiece cover is too big and doesn't last. In general, this is a goalkeeper. The pictures show the size of the phone adapter (depth) compared to the monocular eyepiece. Illustrations with the eyepiece retracted and extended.