Welcome Riccardo, nice series from tha Museo della Civiltà Romana. By the way, next February I am going to Roma (passing by in the way to Venezia/Trieste): is this museum still closed ?
I am eager to visit this museum for the Trajan's column plaster casts and the model scale of Roma Antica, but that has been impossible since the museum is closed at least since 2014!
For today the first test shots of the exotic Medical 200/5.6, obviouly with some "birding" - from an 1 euro battered coin's back
Z7 + FTZ + Medical-Nikkor 200mm f/5.6 F + tripod + focusing rail, ISO 1250, f/16, f/1/25s (top) and 1/13s (bottom). Natural side light from the window.
Not very serious or controlled test, but anyway it appears that indeed this lens is imune to diffraction at f/16, as the results revealed useable images at the f/11 to f/22 range (f/16 best). Apparently the Tele-Tessar design is the responsible for that, as Marco Cavina have described here: http://www.marcocavina.com/articoli_fotografici/TEST_macro_3x/00_pag.htm
Need more time to real life tests with tiny animals and plants, but I am still afraid to use the battery pack that come with the lens - Not sure about voltage compatibility with modern DSLRs - Rafael, have you some tips?