Very impatient to have a look with the Olympus, and not wishing to move all that stuff anywhere "just to have a look", I've tried it thru the window.
And opened the not so clean window.
That looks promising, not super sharp, the colors are not very accurate, there's some chromatic aberration, but, it's at purpose that I chose that backlight evening sun, it's a hard test for a lens : I'll keep on.
Those leaves are at about 12 meters away from the front of the lens, magnification is important and focusing isn't easy.
I'll try someday extreme macro shots with that lens, but other story.