Lens fungus: An example

Post by **melek** » Sat Jul 25, 2015 5:29 pm

I'm doing some work on a postwar 35mm Biogon for the Zeiss Ikon Contax rangefinder.

Here's a before and after shot of fungus.

Pretty creepy, right?

While this one cleaned up nicely, other fungus had etched the surface of one of the other elements.

PFMcFarland · Post by **PFMcFarland** » Sat Jul 25, 2015 10:02 pm

Once you have it back together, Mike, it might not be too bad. The lens I have on mine now (Opton-Tessar) could use a cleaning, but you wouldn't know it from the results.

Valley Overlook by P F McFarland, on Flickr

PF

Captain Slack · Post by **Captain Slack** » Mon Jul 27, 2015 11:08 am

How did you remove the fungus?

Post by **melek** » Mon Jul 27, 2015 11:51 am

Nothing exotic. Lens cleaner from Rite Aid. This works great for everything from fingerprints to fungus. For heavy grease, I have an industrial degreaser, which also is good for removing old lubrication from helicals, as well as cleaning the blades in leaf shutters and apertures.

Julio1fer · Post by **Julio1fer** » Mon Jul 27, 2015 9:40 pm

That lens is well worth some effort.

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