Poke around the secondary market for some vintage camera lenses and you’ll quickly find that lens fungus is one of the biggest problems in that market. Mathieu Stern is a guru when it comes to old ...

New Delhi: A forgotten lens in a dark drawer. A whiff of humidity. That is all it takes. Days pass. Then weeks. Eventually, beneath the glass, something stirs. Threads. Webs. A delicate frost. And ...