Pancolar was premium product line from Carl Zeiss Jena factory 50mm is so common and well known about it's image quality. 80mm sister if we can say anything is better , yes even better. Sharp at every aperture even wide open amazing.
Small lens not much longer than an 50mm lens and diameter not much bigger either.Lens contrast is perhaps best from eastern block lenses , lens draw stunning images. Lens has only three variants two of them come with M42 mount auto and electric, third one has Practica B mount. No zebra or other finish, a super rare Pancolar 75mm f1.4 exists also as similar item in zebra finish. Focusing is a joy very smooth and accurate, aperture click well at each position. Most lens what you can find come in excellent shape, due lens was pricelly item and people did care about them well.
It is very sharp even when shot wide open. At f1.8 it can handle most available light shots. Itsâ€™ bookeh is really amazing. The image quality is superior to its predecessor, the Carl Zeiss Biometar 2.8 80mm. The focusing is very precise.
This lens has gorgeous Bokeh.
About the bokeh, from my experience and comparison with other 85mm lens (Takumar 85/1.8 and Olympus 85/2), yes it's a bit harsh.
In some condition, the unsmooth bokeh gives more artistic look than the other two lenses.
If you can afford it , don't miss it! I rate it higher than most other portrait lens what I did try , include Leica Elmarit , Carl Zeiss Planar etc. M42 mount makes it to almost universal 35mm portrait lens, works almost on any system except Nikon :( On Nikon working distance is very limited around 1m I think. If you are Nikon owner I recommend to take an inexpensive second hand mirrorless camera and give it a try to M42 and other lenses.