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80-400mm AF-VR ED 4.5-5.6 zoom lockup advisory. Read if you have this lens.
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<blockquote data-quote="D200freak" data-source="post: 512389" data-attributes="member: 41018"><p>[ATTACH]189195[/ATTACH][ATTACH]189196[/ATTACH]</p><p></p><p></p><p>Here we have photos of the torn flex circuit (which I could repair, but I will attempt to substitute one frmo a different model that appears to have the correct wiring even if it's longer and shaped differently) and also photos of the inner cam tube, clearly showing where somebody ELSE boogered the threads trying to get the stubs of sheared-off screws out. That individual is a HACK. He should avoid ever working on lenses. </p><p></p><p>The correct approach is to take such a piece to a good machine shop and have a good machinist mill off the top of the broken screw shaft and then center drill the screw shaft and drill through it, which will most likely drive the screw shaft cleanly out the hole without doing any thread damage. It's a job I could have</p><p>done myself, as I'm a machinist myself. (Amateur, but good enough for this.) </p><p></p><p>I have a new cam tube coming to me in about a week, along with every other part I need to restore this lens to good working order. </p><p></p><p>But I will still attempt to repair this cam tube anyway. It'll probably end up getting redrilled, tapped, and have Helicoil inserts put into it. If they can be properly centered up.</p></blockquote><p></p>
[QUOTE="D200freak, post: 512389, member: 41018"] [ATTACH=CONFIG]189195._xfImport[/ATTACH][ATTACH=CONFIG]189196._xfImport[/ATTACH] Here we have photos of the torn flex circuit (which I could repair, but I will attempt to substitute one frmo a different model that appears to have the correct wiring even if it's longer and shaped differently) and also photos of the inner cam tube, clearly showing where somebody ELSE boogered the threads trying to get the stubs of sheared-off screws out. That individual is a HACK. He should avoid ever working on lenses. The correct approach is to take such a piece to a good machine shop and have a good machinist mill off the top of the broken screw shaft and then center drill the screw shaft and drill through it, which will most likely drive the screw shaft cleanly out the hole without doing any thread damage. It's a job I could have done myself, as I'm a machinist myself. (Amateur, but good enough for this.) I have a new cam tube coming to me in about a week, along with every other part I need to restore this lens to good working order. But I will still attempt to repair this cam tube anyway. It'll probably end up getting redrilled, tapped, and have Helicoil inserts put into it. If they can be properly centered up. [/QUOTE]
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Lenses
Telephoto
80-400mm AF-VR ED 4.5-5.6 zoom lockup advisory. Read if you have this lens.
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