Thank you Bart and Serhan for your hints to the reviews and special thanks for the chinese ones . :ROTFL:
I read some reviews before I posted my question here , especially the phillipreeve one , but could not find what I was looking for .
I had this lens available for a couple of hours but had big trouble to properly manual focus .
I am not interested in the AF function , as I think for real macro mode you must manual focus .
What interests me is MF for focus stacking .
I encountered three major issues (might be handling issues) , which I did not describe so far .
As obviously no user here has that lens and can pass on experience , I think I should not describe the found issues and confuse readers , but am ready to do so , if wanted .
I have given back the lens and am waiting for SONY's feedback .