Tevidon C mount is not applicable to common C mount lens adapters.
The adapter is modifying adapter, you need to remove your old mount from your Tevidon C mount lens, to change this mount..after that your lens become a C mount lens for mirrorless cameras.
This adapter enables you modify a Carl Zeiss Jena Tevidon Bayonet lens to C Mount. with c-m43/nex adapter you can fit Tevidon lenses to your EVIL cameras with focus infinity. And the adapter mount also be useful for Tevidon M25 screw C Mount lenses, the original Tevidon M25 screw C Mount lens can not focus infinity without modify the rear of the lens. (Screw may be needed to be replaced)
This adapter is for most of the fixed focus lens (10mm 16mm 25mm 35mm 50mm 70mm 100mm), but is not certainly for Tevidon zoom lens.
But some Tevidon lens in apart original adapter will see there is a metal line, it will lead to after replace our adapter mount the lens can't infinity ,so please pull down the line and replace the mount with Tevidon to C Mount Adapter Mount , that lens can be the infinity.
For Tevidon - c adapter you also can transfer to other mount by adding other adapter.