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Filter fogging problem


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#1 Nick G Smith

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Posted 01 February 2008 - 01:03 PM

I have some Tiffen SFX filters that have developed what looks like fogging marks on the inner glass of the sandwich. They may have been kept in an unsuitable enviroment for some time.
I've tried heating them with a hairdryer but can't seem to get rid of fogging. I will keep them in warm dry place for a while to see if it disappears. Anyone had the same problem - any solutions or are they ng?

Nick
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#2 Jonathan Bowerbank

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Posted 02 February 2008 - 05:23 PM

How old are they? I don't know if it's possible for filters to develop fungus between their manufactured layers, but they could definitely deteriorate if they're kept in an "unsuitable environment". Probably just have to spring for some new ones.
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#3 Chris Keth

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Posted 02 February 2008 - 05:40 PM

Probably just need new ones. There's no guarantee that, even if you can clear them up now, that you won't take them out and find them foggy again when you go to put them in a mattebox tray.

You could try putting them in a warm oven for a while. By warm I mean a hundred degrees or so. If it is just condensation, that should clear it out. I doubt that would be a permanent fix.
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#4 Kevin Zanit

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Posted 03 February 2008 - 03:08 AM

Just relabel how strong they are and ignore the fogging as free diffusion ;)

Tricky problem, I like the oven idea.
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#5 Nick G Smith

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Posted 03 February 2008 - 05:48 AM

I'll try putting them in the oven.
I picked them up dirt cheap at a fire sale- set of 6.6x6.6 tiffen sfx - new, pouches and still in crepe paper but probably been sitting on a shelf for years. I checked them for scratches but did not see the fogging till I properly inspected them later. As Kevin says they are are a light fog sfx kind of filter now ! - problem is the fog is not consistant. If the oven trick doesn't work I'll bin them.
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#6 Freya Black

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Posted 03 February 2008 - 07:49 AM

I'll try putting them in the oven.
I picked them up dirt cheap at a fire sale- set of 6.6x6.6 tiffen sfx - new, pouches and still in crepe paper but probably been sitting on a shelf for years. I checked them for scratches but did not see the fogging till I properly inspected them later. As Kevin says they are are a light fog sfx kind of filter now ! - problem is the fog is not consistant. If the oven trick doesn't work I'll bin them.


Maybe they could still be used for dream sequences even with the inconsistent fog, but if it's fungus then that isn't so nice.

love

Freya
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#7 Chris Keth

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Posted 03 February 2008 - 11:21 PM

Don't pitch them. You never know when you might want a wierd filter :)
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