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wet lens thread stuck on flip holder

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Another approach is to soak it in vinegar/water for a day or two to soften and dissolve the hard water deposits of calcium-magnesium-aluminium gunk. Then use penetrating oll, allow it to soak in overnight to lubricate the screw threads, followed by trying to unscrew it with one or two strap wrenches.

Edited by Kraken de Mabini
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  • 2 weeks later...
Posted (edited)

In case you're still stuck, try some heat or cold treatment.


I had a similar issue with a Inon snoot some time back.  Two step up rings with fine threads were hopelessly locked together.  Tried a strap wrench alone and with penetrating oil, but no luck.  Finally put both pieces in the freezer for a bit and then put the strap wrench on it again.  They finally came unstuck.  I guess cold shrunk the pieces enough to permit movement.


Mild heat would do the reverse.  Maybe a few cycles of cold/heat might generate enough expansion/contraction to break free any oxidation.


Hope it helps.

Edited by mcgowman
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On 4/25/2024 at 9:25 PM, christophe chellapermal said:

Hey everyone i own a nauticam lens i cant seem to unscrew from my flip holder i assume theres been some aluminium oxydation.. would anyone have any tip to help me ?


Thank you 



Agree with all the above suggestions. I typically unscrew the lenses after diving and rinsing just to prevent that.

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