Hi
I have a Hoya 58mm CPL filter about 10 yrs old. I notice there is some oil-like substance present between the two glass elements of the CPL filter for those for u who know CPL filters can be turn 'horizontally' and 'vertically'.
Is it due to heat that the oil surfaced in the filter? I wonder how to remove that oil? Thanks. Or shd i just go get another CPL filter?
I have a Hoya 58mm CPL filter about 10 yrs old. I notice there is some oil-like substance present between the two glass elements of the CPL filter for those for u who know CPL filters can be turn 'horizontally' and 'vertically'.
Is it due to heat that the oil surfaced in the filter? I wonder how to remove that oil? Thanks. Or shd i just go get another CPL filter?