Don't look at the stl too much.
The stl ist just an example, with the included Fusion 360 file you can create whatever lens hood you want!
Adjust the "Change parameters" to your needs. To get the right fitting to your lens you may need to adjust "threadoffset" parameter
Succesfully printed with:
PETG (recommended)
0.15 layerhight,
support only for the firs 5mm from the bed
The author hasn't provided the model origin yet.