Download Free 3D Model Eken H9R Action Camera Lens Hood 3D Print Model

Summary
Here is the lens hood to cover side light (there are two pictures to show the effect)
Eken H9R has 20.8mm diameter lens, so the unit has 21m hole. You might zoom with your slicer to adjust the hole size for your meeds. The hood is for the 170 degree lens angle.
Obviously it is recommended to use black (mate) filament to avoid reflections.
The printing face down, no additional support needed. Even with this low angle using 0.1mm layer high and good cooling the PLA 50mm/s, 0.4mm nozzle seems to print nice.