YSCO Powerful Monocular, Handheld Telescope for Stargazing 300x Magnification, Monoculars for Adults with Night Vision, Waterproof Portable Spotting Scopes for Birdwatching
10X 300X Mini Monocular Telescope BAK4 Prisms Life Water resistant w/ Phone Holder Mini Tripod Stand Carry Bag for Watching Bird|Photo Studio Accessories| - AliExpress
Amazon.com : Telescopes for Adults Astronomy, 30X-300X Refractor Telescope for Kids and Beginners, 50mm Aperture 600mm Portable Telescope with Tripod, Phone Adapter, Shutter Remote to View Moon and Stars : Electronics
What can a 300x zoom see in a telescope? What zoom should I go to for nebulas? - Quora