werner_stein

<p>I studied microbiology and I can tell you that it is delusional to think, that you can eliminate fungus just by carefully removing all visible fungus and keeping away all objects which were infected with fungus.<br>

New fungus grows from spores. Spores are incredibly tiny and even under a microscope difficult to recognize. They are in normal house dust and they are the tiniest particles in that dust. They are so light that they can fly for days. Even in apparently clean air you can find flying spores, if you let this air pass through microfilters.<br>

Spores are very resistant to all hygiene measures. They even survive boiling water, detergents and most disinfectants. Sunlight, heat and drying up for many years cannot kill them.<br>

That is why it is delusional that you can prevent fungus from growing on your lenses by thorough cleaning and removing. You cannot prevent fungus from BEING on your lens. You just can prevent fungus from GROWING on your lens.<br>

Theoretically from one single tiny spore trillions of fungi can grow and cover a whole lens, but only if this spore gets sufficient water. Spores without humidity are nothing but invisible harmless micro-dust.<br>

That means the only promising strategy against fungus on lenses is to keep up a low humidity in the direct environment of these lenses: If you live in a rather dry climate then it is enough if you don’t store lenses in damp rooms or cellars and don’t keep them in cases when these cases for instance are soaked with rain.<br>

But if you live in a humid climate or if you often work outdoors in rain, then you need airtight desiccant lens cases to be sure that fungus won’t destroy your lenses. For more details you can read this:<br>

<a href="http://www.mennon.net/main/productClass1.jsp?id=10">http://www.mennon.net/main/productClass1.jsp?id=10</a></p>

<p>@ Khiem Le:<br /><br />Please check the link about fungus on lenses in the www.mennon.net website which I put in my posting. There you can find, that you cannot prevent fungus spores from getting on your lenses, cause these spores simply fly everywhere. <br /><br />You only can prevent these spores from growing by keeping your lenses absolutely dry, cause spores never grow without humidity. Spores which don't grow are no problem, cause you either cannot see these microscopic things or you can remove them like dust. <br /><br />A good way to keep your lenses absolutely dry is keeping them in the mennon Desiccant Lens Cases.</p>

<p>I think the only really successful concept to prevent damage by fungus is to keep the camera lenses always in a surrounding with a rather low humidity. If you have to stay in a humid climate that can only be achieved by an airtight lens case and a desiccant. In this link you can find some interesting information about that problem and its solution:<br>

http://www.mennon.net/main/cms.jsp?id=31</p>