Kostas, probably a 6-element Cosina lens as it was offered by Porst together with Cosina made cameras. I have found only one other reference to a 1.2/55 lens and that points towards Vivitar - but Vivitar never made lenses themselves. According to the Vivitar lens numbering code, a "9" as the first digit means it was made by Cosina (see http://www.cameraquest.com/VivLensManuf.htm). So if your 'Porst' lens number begins with a 9 and if it follows the same numbering system...
Regards, Sven Zitat von Kostas Kavoussanakis <[EMAIL PROTECTED]>: > On Tue, 8 Feb 2005, keller.schaefer wrote: > > > Porst is not my primary brand of interest but I still think that what has > been > > said do far does not do this name justice. > > Any comments on the Porst 55/1.2? What is its provenance, given that > it was not them who made it? > > Thanks, > > Kostas > >