Is this fungus or lens element separation ?

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Michael Piziak
Michael Piziak Contributing Member • Posts: 547
Is this fungus or lens element separation ?

Is this fungus or lens element separation?
Penax M 100mm macro lens
I've used the lens for years and it doesn't interfere with the images (see images at Michael Piziak | Flickr)

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 Michael Piziak's gear list:Michael Piziak's gear list
Pentax K-r Pentax smc DA 18-55mm F3.5-5.6 AL Pentax smc DA 55-300mm F4.0-5.8 ED +1 more
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