Middle of Circular Polarizer Dirty?


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racoon31e

New Member
Oct 12, 2007
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#1
Hi

I just got a circular polarizer from my friend who no longer has a use for it. The middle of the filter (the part in between the 2 rings) seems to be dirty. Is it possible for me to separate the 2 rings and clean them? If yes, how do I detach them?

Thanks.


PS: It's a Hoya filter
 

Mar 15, 2008
69
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6
Singapore
#2
Hi

I just got a circular polarizer from my friend who no longer has a use for it. The middle of the filter (the part in between the 2 rings) seems to be dirty. Is it possible for me to separate the 2 rings and clean them? If yes, how do I detach them?

Thanks.


PS: It's a Hoya filter
Hi,

I am not too sure. Maybe other forum members can help. In a lab setting, I will use ultrasonicator to clean it by vibrating out the dirt and grime. But I guess the water may go in between the two glass pieces. So may not be a feasible idea.

In a home setting, maybe you like to try using a tweezer (available outside) and slowly scrape out the dirt.:) But a word of warning, the tweezer is sharp so be careful not to scratch the aluminum filter ring or even worse, the filter glass itself.

Cheers,
 

chngpe01

Moderator
Staff member
#4
There is actually liquid, if I am not mistaken some form of lubrication between the 2 glass. If you open it that's the end of your polarizer.

Once I had a Hoya CP and the from glass just dropped off, oily liquid was found dripping. That's how I found out about about it.

Correct me if I am wrong.
 

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