There are 4 objects in this STL file.
The FDM lens cap has a lens anchor and cap, 2 pieces. Both have a notch, to distinguish from Resin version. I just used PLA, can work fine as PETG.
Resin version fits on smoothly. If you prefer to model your own, main thing is to use a Lens ‘hole’ of 49.91mm for a tight fit, or 49.95mm for a slightly looser fit.
Orientation of the resin cap should be face down, with the complex bits facing away from the build surface - otherwise it may droop or sag when casting the radial tabs.
I'd recommend ABS+ or another type of strong resin, regular resin is ill-suited to a protective application.
Enjoy!
The author marked this model as their own original creation.