Summary This is an adapter to use add-on lenses for the Logitech C270. I use it with a fisheye lens (smartphone gadget) at my printer. The design is for lenses with a 17mm thread - there is no thread in the model, cause the thread is too fine. I smoothly turned in the lens. I used ASA, Please have also a look to the mount bracket for the Logitech C270 Print Settings Printer: GermanRepRap x350 Rafts: Doesn't Matter Supports: Yes Resolution: 0,1 Notes: ASA is good in case of stiffness but flexible enugh to put on the cam. support inside the hole