Pre WWII CZJ lenses were and are superb, world class. After WWII, the Zeiss operation was is Oberkochen, West Germany, and the Jena factory in East Germany was under "new" management. Quality control was iffy, and in general the products were comparable to other Eastern bloc products. Which is to say, nothing to write home about. A good one was very good, and the worst were truly horrible, and the majority probably fell in the middle in typical bell-curve fashion.
Originally Posted by vegeotto