Fungus inside lens

[thecomplete]

I have a Minolta 75-300 (Big Beercan) lens which happens to have some fungi inside the plastic part (not on the optical parts). Do you guys know whether it'll affect the quality of the lens or if there is chance that the fungi may develop onto the lens?

 

[Dao]

Are you sure it is on the plastic part? If yes, I do not believe it will affect the image quality. From what I learn so far, make sure you kill the fungus to stop it from spreading and Sun (UV) can do the job. So make sure no UV filter when you place it under the sun. I had one lens I bought on ebay that has fungus on the glass. And that was what I read from the net at that time. (The seller let me returned the lens and refund my money including shipping cost for both ways)

 

[thecomplete]

Yes it is on the plastic inside the lens, and the image quality is not affected. Since the cleaning fee is too expensive that I wonder whether I can just leave them there. Used for 2 months and they don't seem to spread...