I had lenses that had no rear lens cap so I decided to create one. I tried and fits well in my examples but if you will have any suggestions I'm open to that :) You can print it without support flat on the bed. There is version for lenses with deeper cap and normal one so you can pick which you want :)
Fuji_GX680_Fujinon_rear_lens_cap_thic.stl | 788.8KB | |
Fuji_GX680_Fujinon_rear_lens_cap_thin.stl | 792.6KB |