About Fungus in Lenses
It begins quietly, almost invisibly, as most forms of decay do. A lens sits too long in its leather case, in a cupboard that has known one too many winters. When you lift it out, turn it toward the light, you notice the faintest tracem, a soft filigree across the inner glass, like frost that has forgotten how to melt. That is how the fungus announces itself. Not with corrosion or catastrophe, but with a whisper of life where there should be none.
Inside the sealed darkness of a Nikon lens, the conditions are perfect for something microscopic to dream of growth. There is warmth, the residue of skin oil, a touch of organic dust, and above all the endless night between the elements. The spores, ever patient, wake when the air grows damp. They weave their threads across the coatings, following the faint geometry of the optics, until the glass itself begins to resemble a tiny overgrown garden. It’s beautiful in its own way. Tragic, delicate, and strangely alive.
What astonishes me is how little this invasion seems to matter to the image. I have looked through lenses with visible fungal webs, expecting disaster, and found the photograph unchanged. Sharpness still bites, contrast holds, the world appears with its usual insistence. If anything, the light feels gentler. The edges soften just enough to remind me that perfection is an illusion; that a trace of imperfection may be the final ingredient of character. Perhaps the fungus functions as a natural diffuser, filtering the zeal of modern contrast through an organic veil. The lens breathes differently. Less like a machine, more like a living thing that has aged with grace.
Of course, one should not romanticize it too much. Fungus eats coatings, and coatings are the skin of optics. Left long enough, the bloom turns to etching, the threads bite into glass, and the lens begins to die. Yet even that carries a certain poetry. A fungus-ridden Nikkor is not a failed instrument but a memento of storage and neglect, of travels unmade, of light withheld too long. Every mark in the glass tells a story about human absence, about what happens when precision is left alone in the dark.
Prevention is simple, though it too has the air of ritual. Lenses prefer dry air, open shelves, and a little sunlight now and then. They dislike confinement, dislike silence. A lens that sees the world regularly seldom molds; its own use becomes its best medicine. There is a moral there, I think: that objects, like people, decay fastest when forgotten.
If the fungus has already taken hold, the cure is half science, half patience. Dry the air, separate the infected lens, give it a few hours of daylight. The ultraviolet will do what it has done for eons, remind living things of their limits. Some photographers send their lenses off for surgery, where a technician opens the body and wipes away the web. Others, like me, sometimes leave it alone. The damage, if it can be called that, becomes part of the lens’s biography. I have known Nikkors that carried their faint ghosts of mold for decades, still making images with a quiet, human softness that no modern coating could replicate.
There is, beneath the microscope, a metaphor here for photography itself. The same conditions that feed the fungus: darkness, humidity, neglect, also surround the latent image before it meets the light. Both are acts of waiting, of suspended transformation. Perhaps that is why I’ve come to regard fungus not only as a fault, but as a reminder of the delicate line between creation and decay. Every lens is a small ecosystem, and every photograph is a brief clearing in the fog.
So I clean what can be cleaned, dry what must be dried, and accept the rest as patina. A trace of fungus inside a fifty-year-old Nikon lens does not ruin its vision; it merely adds another layer of time to the glass. And when I look through it, I sometimes imagine that what I see, that gentle bloom softening the light, is not damage at all, but the quiet memory of a world once stored away, still waiting to be seen.
