Hi, I already have Pana 25mm and Oly 45mm. But, i'm eyeing for fast classic 50mm (f1.4 or f1.2) to get even shallower dof. The main use is for portrait. My concern of classic/legacy lenses (Pentax Takumar, Canon FD, Nikon ais, Minolta MD, CV Noktor etc) is they all have old optical designs and therefore, very soft wide open and even at f1.8, Oly 45 will be sharper. Is it true? Is there any sharp legacy lenses at wide-open or at f1.8 sharper than Oly 45mm? Thanks.