The problem is that in this objective as usual is not focused on the objective, but simply the distance to the subject is changed depending on the zoom factor. In other words, at 1: 1, the front lens must be 110mm away from the subject, at 5: 1, it is only 44mm.
This goes with this flash but no longer!
Strictly speaking, since he sits in front of the lens and not all around, it flashes from 3: 1 to about my motive.
The thing is good and reasonably priced, but if you want to use it for the MP-E65 or other lenses with really short Nahstellgrenzen, I regret to advise against it.