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<blockquote data-quote="D200freak" data-source="post: 514210" data-attributes="member: 41018">I'm in the end stages of repairing one of these lenses.&nbsp; I got the right parts to do it, with no small amount of difficulty.I've never really had a chance to work with one that didn't need repair so hence this question:When operating the focus,&nbsp; does the front glass move in and out?Or the zoom, for that matter?I'm asking because there's something about the front section of the lens that isn't really making a lot of sense to me yet. There is what I would presume is a provision for the front lens to move&nbsp; and focus,&nbsp; but if that's the case then I'm either missing something about how it goes together or I'm missing one or more parts. Knowing if the front glass moves, and under what conditions, would be very helpful.I'm reasonably sure (now) that the front glass moves as part of the zoom mechanism.&nbsp; Because that's working but not completely.&nbsp; &nbsp;&nbsp; So specifically, when you zoom, does the front glass also rotate?&nbsp;&nbsp; I'm guessing the answer should be no.&nbsp; &nbsp;&nbsp; Currently mine rotates through a short arc and I need to figure out what's allowing that to happen.</blockquote>

[QUOTE="D200freak, post: 514210, member: 41018"] I'm in the end stages of repairing one of these lenses. I got the right parts to do it, with no small amount of difficulty. I've never really had a chance to work with one that didn't need repair so hence this question: When operating the focus, does the front glass move in and out? Or the zoom, for that matter? I'm asking because there's something about the front section of the lens that isn't really making a lot of sense to me yet. There is what I would presume is a provision for the front lens to move and focus, but if that's the case then I'm either missing something about how it goes together or I'm missing one or more parts. Knowing if the front glass moves, and under what conditions, would be very helpful. I'm reasonably sure (now) that the front glass moves as part of the zoom mechanism. Because that's working but not completely. So specifically, when you zoom, does the front glass also rotate? I'm guessing the answer should be no. Currently mine rotates through a short arc and I need to figure out what's allowing that to happen. [/QUOTE]

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