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Repair, or replace it?
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<blockquote data-quote="Clovishound" data-source="post: 809883" data-attributes="member: 50197"><p>Well, I ran across an interesting video. There is a fellow that has this lens with what looks like the same problem as mine. He disassembled it and discovered the issue, but was unable to fix it due to lack of parts available. </p><p></p><p>It seems that the STM and manual focus ring connect with two plastic barrels , one inside the other. One has two square nubs that mate into slots on the other barrel. Those nubs are broken on his. I'm thinking about tearing it down and see if I can just glue the two barrels together. It might mean it can't be disassembled again, but at this juncture, it is an expensive paper weight. </p><p></p><p>Like the famous line from Young Frankenstein, "IT COOOUULD WOOOORK!!!!!!!!!!". The main thing that concerns me is that disassembling from the top, as he is doing, requires that the front element is removed. It is secured by a half dozen or so small screws that don't look like they have any adjustment. I wonder if this is something that would actually require some type of adjustment with special equipment, or if it should go back into place where it needs to be and still be in spec. The other option would be to try and work from the other end, but not sure I could get to what I need to in order effect the repair. From seeing the partial disassembly, I have my doubts about working from the bayonet end.</p><p></p><p><a href="https://www.youtube.com/watch?v=Ejn6o2c84hU&t=276s" target="_blank">Youtube video link if interested</a></p></blockquote><p></p>
[QUOTE="Clovishound, post: 809883, member: 50197"] Well, I ran across an interesting video. There is a fellow that has this lens with what looks like the same problem as mine. He disassembled it and discovered the issue, but was unable to fix it due to lack of parts available. It seems that the STM and manual focus ring connect with two plastic barrels , one inside the other. One has two square nubs that mate into slots on the other barrel. Those nubs are broken on his. I'm thinking about tearing it down and see if I can just glue the two barrels together. It might mean it can't be disassembled again, but at this juncture, it is an expensive paper weight. Like the famous line from Young Frankenstein, "IT COOOUULD WOOOORK!!!!!!!!!!". The main thing that concerns me is that disassembling from the top, as he is doing, requires that the front element is removed. It is secured by a half dozen or so small screws that don't look like they have any adjustment. I wonder if this is something that would actually require some type of adjustment with special equipment, or if it should go back into place where it needs to be and still be in spec. The other option would be to try and work from the other end, but not sure I could get to what I need to in order effect the repair. From seeing the partial disassembly, I have my doubts about working from the bayonet end. [URL='https://www.youtube.com/watch?v=Ejn6o2c84hU&t=276s']Youtube video link if interested[/URL] [/QUOTE]
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Repair, or replace it?
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