Is this Fungus? If so: How to disinfect and remove fungus from a filter?

[l2oBiN]

I purchased a kendo pola green/red filter. It has some white blotches on one side. Could this be be fungus? Maybe just dirt? Pics below.

What is the best way to clean this off?

[Louis Pacilla]

This looks like haze formed between the clear sheets that trap the color gels in the holder. Try taking the holder apart and gently cleaning all surfaces with a damp clean soft cloth then dry all surfaces with a dry clean soft cloth.

[aaronnate]

looks like it. Can you separate the two layers?

[ic-racer]

My experience is that fungus wipes off easily, just like haze or other residue. What remains (if it does not clear up) is permanent damage to either the coating or, in extreme cases, the underlying glass.

[morecfm]

Typical seller disclaimer: "...should not affect image quality"

[l2oBiN]

What is the best way to clean it up and to kill the fungus?

There are some references on the net to a vinegar solution, others to peroxide and ammonia. I want to try and preserve my coating so don’t want to dip/clean it in things that could be damaging..

[Leigh]

What is the best way to clean it up and to kill the fungus?

There are some references on the net to a vinegar solution, others to peroxide and ammonia.

It's difficult to make any recommendations regarding such a broad subject.
Fungi is a Kingdom in biology, just as animals, plants, and bacteria are Kingdoms.

It's estimated that the Kingdom of Fungi may include as many as 3.8 Million species.
Some commonly-encountered special groups are mushrooms, truffles, mold, and yeast.

Some fungi often encountered on lenses eat the fluoride anti-reflection
lens coating and excrete hydrofluoric acid, which etches the glass.

- Leigh

[l2oBiN]

For the benefit of others, here is an a reference from a peer reviewed journal on how to store optics to prevent fungus and how to clean and disenfect.

https://www.ncbi.nlm.nih.gov/pmc/art..._26_83_057.pdf

[swmcl]

IMHO, alcohol is the quite adequate for cleaning and fungus removal. In the form of Windex is handy but a pure alcohol would be best - metho is an option. Cleaning can also be affected by using dishwashing detergent or some such. Best not to get too precious about it really.

Personally, I would not use an acid like vinegar.

The article above is good too.

[l2oBiN]

Looks like it cleared up well