Even the older Yashikor lenses shouldn't have been entirely soft. The Yashinon in the later ones are good lenses. There are several shots on my Flickr page made with mine. This past Christmas I gave my mother and father in law a mounted, framed print roughly 15" square made from a Pan F+ negative shot in my Yashicamat. They love it.
Originally Posted by Alan Gales
They probably just missed focus, or the lens was a bad sample, possibly damaged or the focus mechanism was misadjusted.