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How to "repair" broken/beaten filter/attachment th
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PostPosted: Sun Jul 20, 2014 2:53 pm    Post subject: How to "repair" broken/beaten filter/attachment th Reply with quote
any good DIY with common tools?


PostPosted: Sun Jul 20, 2014 5:17 pm    Post subject: Reply with quote
Use the Search function (top of this page) to look for 'filter' in this forum 'Equipment Care and Repairs'. There are 14 topics (including yours) and such as http://forum.mflenses.com/bent-filter-ring-repair-technique-t46159.html


PostPosted: Sun Jul 20, 2014 10:17 pm    Post subject: Reply with quote
Check out my Blu-tak method

http://forum.mflenses.com/easy-filter-ring-dent-removal-ttp-with-photos-t64651,highlight,%2Bfilter+%2Bring+%2Bdent.html


PostPosted: Sun Jul 20, 2014 10:39 pm    Post subject: Reply with quote
I tried the blu tak the other day with great success. Very Happy


PostPosted: Mon Jul 21, 2014 12:47 am    Post subject: Reply with quote
Cheers Dave.

I was looking at your other method thru the link above. Nice, but time consuming.


PostPosted: Mon Jul 21, 2014 1:18 am    Post subject: Reply with quote
philslizzy wrote:
Cheers Dave.

I was looking at your other method thru the link above. Nice, but time consuming.


Pros do almost on same way or exactly same:)


PostPosted: Mon Jul 21, 2014 9:37 am    Post subject: Reply with quote
Attila wrote:
philslizzy wrote:
Cheers Dave.

I was looking at your other method thru the link above. Nice, but time consuming.


Pros do almost on same way or exactly same:)


I can imagine. It would need a set of these tools obviously and the advantage of using Dave's method is that you are less likely to overdo it. Which is a danger.

Mine is a quick and dirty technique requiring only the basic tools.


PostPosted: Mon Jul 21, 2014 10:57 pm    Post subject: Reply with quote
I have now got a few home made formers, 55, 58 and 62 I think, and they do work well. I make them from 10mm thick ABS plastic sheet and put a layer of sticky tape over the surface to stop marking the lens paint. I also use the ABS to make my punch, it's soft enough to not damage the filter thread and hard enough to transmit the force of the hammer. And again I often use insulating tape over the end to make a thin and soft layer on the end of the punch.
For a badly bent filter ring I would probably use a former with the correct radius, but for lighter damage I'll be using Blu Tack


PostPosted: Tue Jul 22, 2014 10:46 am    Post subject: Reply with quote
Has anyone any thoughts on this:

I understand the methods already discussed work well to remedy side-on bending of the filter ring, where the ring has been struck from the side and must be put right.

I have one lens with filter ring damage where the lens was struck from the front. This end-on damage crushed the threads. There is very little inward bending of that filter ring. What I need to do is somehow to re-stretch out the ring at the crush point, opening up the crushed threads.


PostPosted: Tue Jul 22, 2014 7:27 pm    Post subject: Reply with quote
Ooh, that sounds difficult, blu-tak or formers aren't going to sort that out easily.

I have had crushed filter threads too when a filter had been on the lens and the camera's fallen forward. I usually smash the filter* and cut the ring off with nippers, when the lens is straightened out I file down the damaged threads.

I am thinking fine pliers, pulling the damaged part forwards a fraction at a time. The filter thread will be no good anyway, that may do it,
then straighten the filter ring and file down the threads. It's what I'd try

Its going to look a mess whatever you do but it may work.

* stick duck tape over the filter glass first or attack the mount with the nippers. If you try to remove the filter with a wrench or something you may damage the internals of the lens.


PostPosted: Wed Jul 23, 2014 12:11 pm    Post subject: Reply with quote
philslizzy wrote:
Ooh, that sounds difficult, blu-tak or formers aren't going to sort that out easily.

I have had crushed filter threads too when a filter had been on the lens and the camera's fallen forward. I usually smash the filter* and cut the ring off with nippers, when the lens is straightened out I file down the damaged threads.

I am thinking fine pliers, pulling the damaged part forwards a fraction at a time. The filter thread will be no good anyway, that may do it,
then straighten the filter ring and file down the threads. It's what I'd try

Its going to look a mess whatever you do but it may work.

* stick duck tape over the filter glass first or attack the mount with the nippers. If you try to remove the filter with a wrench or something you may damage the internals of the lens.


Thanks. Sorry for any confusion owing to the unclear way I wrote earlier. There is (and was) no filter on this lens. It is the filter ring, the filter thread, of the lens itself that took the straight-on hit. Sadly.

And I agree: this is a tough one to put right without a donor lens!
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