This lens was not made by Panagor, but by Kiron (it’s a brand name of Kino Precision Company) in mid seventies. You can also find the same lens branded as Vivitar. It is extremely well built. With its large front element, fancy lettering on the barrel, all metal and glass, black and silver construction it looks great on the Panasonic GH1, and that’s why I bought it. This simple review (more of a user report, actually) first appeared on my old website, but I think it is still perfectly valid as more and more people are discovering these old lenses, using them on digital mirrorless bodies with adapters.