Tone Andersen

Hi, I am considering to buy a used optar 25-80mm PL mount zoom lens for all-round documentary use for the Sony F3 camera but can't find much information on this online. Has anyone got experience with this lens in regards of sharpness, breathing and vignetting? (I am considering this as a good price alternative to other PL zoom lenses out there that are minimum 5 times as expensive.) Tone