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Take care when cleaning lens from fungus
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PostPosted: Mon Dec 29, 2014 7:05 pm    Post subject: Reply with quote

Hi, today I realized I've got many of lens attacked by fungus during Winter: Tair 133 (very obvious fungus), Trioplan 100, Triotar 135 and Tair 300 starting to be as well. I plainly underestimated the situation, having long-term humidity problems in my house, especially at one of the corners my lenses are currently stored.

Never facing such a stupid crappy organism, I wonder what to do next? My only "weapons" are one small silica gel package, lot of various lights in my room and two corners with significantly lower humidity (you can actually see that from walls).

Can I save (or at least stabilize) the situation simply by putting lens into an open vitrine with light source installed in? Of course without caps, I believe dust can be always easily removed, have some basic tools for it. Wouldn't that be better than dark, humid, relatively warm corner of my wardrobe (or what is it actually) and with caps?

If having some not yet infected lens (or at least not visible), like Telemegor 180, Helios 40 (living with me for not a long time, actually), or some apparently more fungus-resistant modern lenses, should I keep them as far as possible or is this just a blind myth?

Seems to be a rather seasonal problem. Like the lens might miss especially the sun or possibly light source of any kind. Didn't have that problem in Summer perhaps because majority of lens was just frequently in use.

Thanks for any help. Ain't going to underestimate that crap again.


PostPosted: Tue May 19, 2015 3:39 pm    Post subject: Reply with quote

Just a word of warning... If you leave the lens in an acid long enough, it can strip the metal coatings off the glass. May take a long time but soaking an element in vinegar long enough could do this. Note that I haven't tried to find out how much time is required, but I might to fix a lens with scratches in the coating that render it less than functional.


PostPosted: Sat Feb 02, 2019 4:00 am    Post subject: Reply with quote

I haven't seen any mention of the haze in the lenses ,posibly after the fungus cleaning. I have just cleaned a pentacon 200 with fungus ,which camed off pretty easy,as the fungus was on the edges and small, but after cleaning with isopropyl alcohol, there's still some haze in the glass. Anybody could tell me what opions are there to get rid of the haze? Maybe some hands cream polishing the lens? Sad


PostPosted: Sat Feb 02, 2019 12:36 pm    Post subject: Reply with quote

a20010494 wrote:
Quoted from pentaxforums:
If you can get the on your camera, they're great: any fungus they harbour is easily cleaned up with some clotrimazole cream.

True?



That's what I've been using for some years. Contained in the form of a tube of athlete's foot remedy. It has proved highly effective. As an experiment, I've washed off on my Takumar lenses and just buffed off on the PK lenses, to see if the Clotrimazole has any 'active' ability long term. As I only started doing this about 4 years ago, there's nothing to report.


For me, using Clotrimazole is an experiment, and on lenses I've paid relatively little for really, so to anyone wanting to try, I'd start there too.