Celestron's StarSense DX 130AZ telescope uses your phone as a guide at low of $350
Cassegrain 250mm f/15 for Hi-res imaging - YouTube
Celestron Libra 705az Astronomical Telescope Professional Stargazing High Power Hd Children Adult Telescoop - Telescope - AliExpress
Amazon.com : Celestron - Zoom Eyepiece for Telescope - Versatile 8mm-24mm Zoom for Low Power and High Power Viewing & NexYZ 3-Axis Universal Smartphone Adapter : Electronics