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Message: <blockquote data-quote="Paul Corfield" data-source="post: 3219809" data-attributes="member: 19132">Today on ebay I won a EBC X-FUJINON Z 75-150mm lens for just £6. Always wanted to get hold of an EBC lens to see  what the electron beam coating is like. The EBC lenses had 11 layers of multicoatings. I shall post photos taken with the TN element when it arrives.Last week I won a Vivitar lens on ebay. I took a punt because the photo was poor and the seller didn't list what size lens it was. It didn't matter as I got it for next to nothing. Unfortunately it was just a 200mm prime in M42 mount which can't be used on my Nikon camera. With the basic adapter it wont focus to infinity and the more expensive adapters with the correction lens in are basically rubbish. Rather than resell the lens I stripped it down and it turns out that the rear group is a form of TN. I found the rear group to be very sharp but there was CA visible in high contrast subjects and in out of focus areas. The original lens is known to suffer from CA anyway so maybe that's partly where it came from. Mag from the rear group was around 1.5X so a nice usable low power. So that's something to look into a bit more and I shall see what other cheap primes I can lay my hands on. The rear groups in zoom lenses are completely different and are of no use at all. Paul.</blockquote>