Spinnfädenartige Verästelungen am Objektivrand?

Bei meinem ca. 5 Jahre alten Teleobjektiv Panasonic 100-300mm zeigen sich am Rand der Frontlinse Spinnenfädenartige Verästelungen. Sie sind an drei Stellen und ca. 5mm breit und ca. 5mm richtung Zentrum. Woher kann das kommen?

Bei meinen zwei 50 Jahre alten Analogobjektiven habe ich nichts davon bemerkt.

Hat jemand eine Idee was man dagegen tun kann?

Mit Dank im Voraus von Makrofotofan.

(1 votes)
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SirKermit
2 years ago

Could be glass mushroom, see: https://de.wikipedia.org/wiki/glass mushroom

Glass (including fungus of the Latin word for Mushroom) is the triviale Name of infestation Optical Devices Lenses with mushroom threads (Mycelium). by germination of Mushroom spores and renewed spore formation, the infestation can also spread beyond the respective fungal tissue. The glass surfaces of the devices are clouded by the fungal attack. Glass mushrooms can range from small, hardly visible points over an irregularly spreading braid (see illustration) to the complete “blind” of the optics.

As a tip to the distance: https://www.analogicus.de/innenleben/glass mushroom/Es will certainly give more of it.

Jo3591
2 years ago
Reply to  SirKermit

Right, that’s Fungus.

Uneternal
2 years ago

Would also say that the fungal attack is. Did you ever store the lenses in humid environments?

Even you can’t do much now, except for the lenses with UV-A or UV-B light. Lamps get the most for a few euros from China (via Ebay or Aliexpress). Search for reptile lamps.

This, however, only stops fungal growth. For cleaning, you have to become a professional, because the lens has to be completely removed.

Photon123
2 years ago
Reply to  Uneternal

Who’s doing this? Always heard such lenses are not accepted by the service.

Uneternal
2 years ago
Reply to  Photon123

So in groups of vintage lenses I often see people who do this themselves, so surely there is an unofficial service somewhere.

Jo3591
2 years ago
Reply to  Photon123

You heard that.

habakuk63
2 years ago

It’s 99% a glass mushroom.

You should quickly dispose of the lens or send it to the service.

Jo3591
2 years ago
Reply to  habakuk63

Normally, the service does not adopt any lenses affected by Fungus.

Jo3591
2 years ago

You can’t do anything. Call the service to see if they can do what, but most likely they don’t accept any mushroom-infested lenses. Many modern plastic zooms can no longer be broken, as the lenses are no longer screwed, but glued.
The fungus can be killed by intensive UV irradiation or by gassing with formaldehyde. He doesn’t interfere.
In any case, the infected objective will be stored separately from others.