|Posted: Tue Mar 06, 2018 5:30 pm Post subject:
|It's really a Cyrillic 'P', not an 'N', but who's keeping score. When the Soviets grabbed the Zeiss lenses, parts, machinery, data and workers after WWII the J-8 (and J-3, J-9 J-11 and all the others) were marked with the red 'P' to show that they were multi-coated. Most lenses in the post war period were single coated so those with a multi-coating were marked accordingly.
Eventually, I believe in the late 1960s but don't quote me on that, all the lenses were being produced with multi-coatings and the red 'P' was superfluous. It was just dropped, but the lenses produced at that time would have been identical to the red "P" lenses produced the year before. In time, as better coatings were produced, there would be a difference between the newer and older lenses.
Just an armadillo on the shoulder of the information superhighway.