This is an enclosure that snaps on the Hti-Xinati HT-201 thermal camera and allows you to use 20mm CO2 laser cutter lenses so you can get really close to tiny SMD components while still getting a sharp image. It fits in the small pouch the camera came in.

One side of the case is open to allow for different phone case thicknesses.
 

Print the main case with the hole facing up, use supports but make sure there are none on the threads.
Print the lens case with the wider side facing the print bed, print the retaining ring with the slots facing up, if you use supports make sure there are none on the threads.

Print at 0.2mm layer height.

You can use different colors for different lenses, I recommend 38,1mm focal length for crowded PCBs like phones with really small components and 101.6mm for bigger less dense boards like laptop motherboards.

Links:

HT-201 thermal camera: https://s.click.aliexpress.com/e/_c3mbReeL
Lenses (20mm diameter, 38.1mm and 101.6mm focal lengths recommended) https://s.click.aliexpress.com/e/_c2R0XY67