Metal Bayonet Mount EF-S to EF Repair Parts Lens Converter Adapter for Canon 10-18mm f/4.5-5.6 is Lens Digital SLR Camera Lens Mount Converter

all right sometimes I go aboard the Canon ef-s 10 to 18 millimeter F four point five to five point six is STM lens it's a great lens for crop sensor cameras but I personally wanted to use it with my gh4 on a speed booster the latter sadly does not support EFS lens because they have a protrusion that disables the use of the aforementioned EFS lenses on the speed booster so I started googling and I found this interesting tutorial that you use the ten to twenty to this lens is sadly not the same inbuilt as the ten to eighteen and you can just remove the top panel off and it just works but that's not the case on the ten to eighteen and before you start let me say that I thought about using a canon EF mount lens but 10 to 18 can't be matched in price per performance and sharpness in this price range okay so why don't the ef-s lenses work on EF mounts that is I said before because of the prot