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<blockquote data-quote="Bob Blaylock" data-source="post: 296075" data-attributes="member: 16749">I don't know.&nbsp; Alas, I no longer have any of the picture that I took many, many years ago, with this lens on my F2.&nbsp; It sat idle for many years, until I got my D3200.&nbsp; Shortly thereafter, I did discover that there was a nasty smudge of something on one of the internal elements.&nbsp; I have no idea what it was, or how it got there, or how I ever took any decent pictures through it, many years ago, with my F2.&nbsp; I did figure out taking the lens apart enough to get at the affected element, to clean it.&nbsp; Whatever it was was very sticky, and amazingly difficult to clean off of the glass surface.&nbsp; I took great care, when I disassembled this lens, to make sure every part was put back in exactly the same way that it came out.&nbsp; <a href="http://nikonites.com/d7000/18110-old-lens-not-mounting.html#post220667" target="_blank">I did, however, encounter evidence that a previous owner had also disassembled this lens</a>, and it's possible that that previous owner put something in backward.&nbsp; Anyway, looking now through the lens, I don't see any sign of any smudges or other contamination consistent with what you speak of.&nbsp; A few specks of dust, but nothing more.&nbsp; I did mention, above, that this lens produces some odd distortions toward the edges, at larger apertures.&nbsp; I can't say for sure if this was true back when I used it with my F2; but I would expect that it would have been more noticeable then, given the F2's full 35mm frame compare to my D3200's smaller DX-sized frame.&nbsp; See the bright speck, toward the upper right in the pictures below.&nbsp; At ƒ3.8, it gets distorted into a sort of a “comet” shape, pointing toward the center.</blockquote>

[QUOTE="Bob Blaylock, post: 296075, member: 16749"] I don't know. Alas, I no longer have any of the picture that I took many, many years ago, with this lens on my F2. It sat idle for many years, until I got my D3200. Shortly thereafter, I did discover that there was a nasty smudge of something on one of the internal elements. I have no idea what it was, or how it got there, or how I ever took any decent pictures through it, many years ago, with my F2. I did figure out taking the lens apart enough to get at the affected element, to clean it. Whatever it was was very sticky, and amazingly difficult to clean off of the glass surface. I took great care, when I disassembled this lens, to make sure every part was put back in exactly the same way that it came out. [URL="http://nikonites.com/d7000/18110-old-lens-not-mounting.html#post220667"]I did, however, encounter evidence that a previous owner had also disassembled this lens[/URL], and it's possible that that previous owner put something in backward. Anyway, looking now through the lens, I don't see any sign of any smudges or other contamination consistent with what you speak of. A few specks of dust, but nothing more. I did mention, above, that this lens produces some odd distortions toward the edges, at larger apertures. I can't say for sure if this was true back when I used it with my F2; but I would expect that it would have been more noticeable then, given the F2's full 35mm frame compare to my D3200's smaller DX-sized frame. See the bright speck, toward the upper right in the pictures below. At ƒ3.8, it gets distorted into a sort of a “comet” shape, pointing toward the center. [/QUOTE]

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