fantastic sharpness wonderful color rendition

F3.8-5.8 one stop difference from its sister 2.8-5.6

I used Panasonic Leica D 25mm and Leica 14-50mm D 14-50mm f2.8-3.5, Olympus 12-60mm and Olympus 25mm f1.8, Olympus 12-40mm, and this.
But this provides fantastic sharpness after f4 like 12-60mm and the other sister.
No difference at F4 or higher f number.