Hey guys, just putting up this post for someone who's interested in what it looks like when you end up having fungus grow on your lens.
This Nikkor MF 50mm F1.8 belonged to my dad, who had it mounted on his Nikkormat forever and never took it out. Fungus started growing on it, and it's very easily visible against light.
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When I say "MF" I really do MEAN MF, as in the lens' aperture and focus has to be controlled via the aperture ring and focal ring manually. Even on the camera body itself, I have to shoot on manual and determine the shutterspeed myself!
Surprisingly, after shooting with this lens, the results were pretty consistent as if the lens were new. However, in some pictures, you can very easily spot a certain "blooming"(glow) effect in them.
It can be artistic in some ways, and a pain in the ass in others depending on your preference. Here's one of the pictures I had with bloom.