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Cleaning A Vintage Fungus-Infested Lens

Cleaning a Vintage Fungus Infested Lens

We’ve discussed camera maintenance and fungus prevention many, many times. It’s a topic that comes up annually, especially when the weather is hot and humid, and we are worried about our expensive lenses. While modern lenses are less susceptible to fungus, they’re not immune, which is why we take care of them…

But what happens when we come across a beautiful vintage lens that you can buy second-hand, but that’s full of fungus? Well, you try to clean off the fungus and get it working as good as new, of course, and that’s what we see in this video.

Mathiew Stern shares with us, his journey of finding a rare Benoist Berthiot Cinestar GC 75mm f/1.55 projector lens at a ridiculously low price. The catch? It’s completely, and disgustingly, full of fungus.

Mathiew shows us how he disassembles the lens, cleans it up with Hydrogen peroxide and water, and also removes some glue that had congealed and cracked… The experiment is quite interesting, and it’s interesting to see just how much better some of these lenses can be when cleaned up properly, and brought back to life.

Fungus on Lenses

Fungus is a type of microorganism that grows when specific conditions are prevalent. They can grow on camera lenses, and other optical surfaces sometimes. Fungus is typically found in humid or wet environments. When conditions are right, fungus can grow very quickly on a lens. Fungus can cause permanent damage to a lens, and it is very difficult to remove.

Lens Maintenance Resources

There are some concrete steps that you can take to make sure that your lenses don’t get fungus growing on them.

Take Note:

If you have a fungus problem with your camera lenses, you will need to take them to a professional to have them cleaned. You can try to clean them yourself, but it is very difficult to remove all of the strands fungus without damaging the lens.

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