I've meanwhile on the Canon EFS 18-200 mounted and meets its purpose here.
The only drawback: for locking the panel, two plastic clips are attached, which are "only" inserted in the inside of the bezel. after half a revolution, they should engage the lens and the diaphragm hold against unintended rausdrehen / twist. these two terminals are inserted (for me) and slip just before the lock from the recess provided.
I have this now fixed with superglue and now no problems with the fit of the bezel.
Conclusion: for the price goes as a shortcoming in order!