This widget let you fix your cellphone to a telescope. This works by having an app like stellarium or google sky, and allows you to search on an easier way stars and planets. Feel free to modify or change sizes (cellphone and diameter of telescope). This model works with a Xperia Z1, and a 70mm/900mm Celestron Telescope. I'm not responsible for any damages you can cause to your equipment. You just have to download the file, and change sizes to adapt them to your cellphone or telescope. Join both pieces with M3 screws (check sizes, because you can also adapt it to you screws. Put some intermediate sticky foam (forgive me but I dont know the word in english), to prevent it from scratching the telescope tube. Tighten them up. Not so loose it will move up and down, but as tight as to give you opportunity to position it in the telescope tube.