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 ...

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 ...