Hi all been awhile since I've been here but just recently got back into photography and picked up an 85mm f1.8 and yesterday after my new circular filter came in from Amazon I went to put it on and noticed this on/in the lens and was wondering since I just picked it up a week ago from bestbuy (no real camera stores around where I live) should I take it back to exchange it I haven't noticed anything in pictures yet but at almost 400$ for the lens and less than a week old i don't expect defects. Any help or suggestions would be greatly appreciated thank you.