I made an adapter for a small 2x telescope I had laying around, to fit onto an iPhone X as a case.

The telescope mount is just a push fit with the opening at 44.5mm wide and 16mm tall, with a 1.18 degree taper narrowing (43.8mm at its narrowest point) towards the back of the phone case.

This is a fairly simple print, but some things I changed in Cura are as follows;

• Flipped it 180 degrees so that the adapter is pointing up.
• Printed with conical supports (40degrees).
• Reduced support density to %12 (Difficult to remove otherwise).
• Used the concentric pattern for support interface.