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I've checked with other forum and it seems that this particular rear element lens group is not possible to be disassembled with. I'll be checking for possible online replacement part for this. Thanks


It looks like dirt/dried mud to me. It does not have the characteristic "spiderweb" look of typical lens fungus. I've always carried my CPL in the square plastic case that it came in.


I have had a small amount of fungus in some second-hand lenses, I took the rear and front caps off, went out on a very sunny day, and had the sunlight shine directly through them(not attached to the camera obviously) you can get some really intense burn points as the lenses are essentially magnifying glasses. But the UV killed the fungus, I managed to stop ...

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