Lens hood for DJI spark drone. It just snaps on the camera body.
The purpose is, beside avoiding lens flares, protection against rain drops.
The part should be printed as light as possible. Use a single parimeter, thin top and bottom layers, very little infill and a light material. I used 0.4mm shell and 20% infill of lines with petg (witch is quite heavy). It worked well, but there is still room for optimization.