Smartphone mount for telescope eyepiece.

thingiverse

I've crafted this for my Samsung Galaxy J5 2017, a 5.2-inch phone, and a 1.32-inch diameter ocular lens, measuring precisely 33.5 mm in circumference. To secure the eyepiece firmly in place, you'll need to apply some anti-skid rubber sheets on the inner sides to prevent displacement and scratches. I designed this using 123D Design software and printed it with PLA material, but the type of material used barely matters.