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  4. Lens filter threads have been cross threaded

Lens filter threads have been cross threaded


2 weeks 2 days ago #763778 by Jason Stevens
Is there a way to fix this?  It was done on accident, and now can't get a filter on without it following same path. 
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2 weeks 2 days ago #763782 by Razky

Jason Stevens wrote: Is there a way to fix this? It was done on accident, and now can't get a filter on without it following same path. 

You might try using a thread chaser. Hopefully the threads is not plastic.
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2 weeks 2 days ago #763783 by TCav
Generally speaking, the threads on filters are brass or aluminum, so they're softer than the steel threads on the lens, and so are more prone to damage than the threads on the lens.

You can try a thread chaser as @ Razky suggested, or you can try to reorient the filter on an old lens of the same size filter thread (using the old lens' thread to clean the filter's thread), but your best result will be by replacing the filter.
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2 weeks 2 days ago #763785 by Razky

TCav wrote: Generally speaking, the threads on filters are brass or aluminum, so they're softer than the steel threads on the lens, and so are more prone to damage than the threads on the lens.

You can try a thread chaser as @ Razky suggested, or you can try to reorient the filter on an old lens of the same size filter thread (using the old lens' thread to clean the filter's thread), but your best result will be by replacing the filter.

According to what the OP wrote, the lens' threads are damaged, not the filter.
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2 weeks 2 days ago #763786 by Jason Stevens
Thank you both, yes that is correct, it's the lens threads that are damaged.  Going to look to see what is a thread chaser.   
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2 weeks 2 days ago #763796 by TCav

Jason Stevens wrote: Thank you both, yes that is correct, it's the lens threads that are damaged.  Going to look to see what is a thread chaser.   

Be careful. Depending on the lens, the filter threads might be very close to the objective lens, so damaging the optics is a real possibility while trying to repair the threads.
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2 weeks 1 day ago #763826 by TCav
Because filters have threads made of softer material than is used on the threads on lenses, it would be extraordinary for the threads on the lens to be damaged. You may only need to clean those threads in order to make them functional again.

Just don't use the filter that caused the problem. Toss it.
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1 week 3 days ago #763928 by Street Shark

TCav wrote: Because filters have threads made of softer material than is used on the threads on lenses, it would be extraordinary for the threads on the lens to be damaged. You may only need to clean those threads in order to make them functional again.

Just don't use the filter that caused the problem. Toss it.


What's funny is this happened to me a few years ago, and I thought the threads on the lens were made of plastic of some sort.  
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1 week 1 day ago #763977 by Sassy Girl
This happened to me nearly 8 years ago, I sent to manufacture to be repaired
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5 days 1 hour ago #764066 by Roger Lang
Worst feeling ever.  This happened to me a few years back on a 70-200 I had.  I had to screw on the filter very slow, starting off by reverse threading till I found the magical spot, then turning clockwise to slowly, insuring the filters threads were lined up correctly.  
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The following user(s) said Thank You: CharleyL
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4 days 21 hours ago #764074 by CharleyL
" I had to screw on the filter very slow, starting off by reverse threading till I found the magical spot, then turning clockwise to slowly, insuring the filters threads were lined up correctly."

This is something that everyone should be doing when installing a filter. It's way to easy to cross thread them because of their large diameter and fine threads. Backing up until you feel the "click" in the end of the threads will help you get the filter installed without cross threading it. Once at that point, the threads of the filter and those of the lens should go together correctly. This is an old machinist trick that few people seem to know. 

Charley
The following user(s) said Thank You: Scotty
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