I recently bought this lens which is supposedly in MINT condition. When I turn the front glass at a certain angle I see some small stains inside the front element. I asked the dealer and he said they are Belagflecken (stains in English) and it is normal for such a lens. Umm, am not so sure. I have 4 week return possibility so thought of asking you people who own this glass.
Thanks a lot everybody. I will test the lens again today and will return it asap.
overdal, it is perhaps fungus, something I will definitely do not want to worry about.