Hi, I am a newbie to this forum. I ordered Nikon 16-35 lens from Best Buy! I received it today and while examining the lens, I discover the curvilinear mark on lens, it’s hard to point exact location if it is on surface of glass or deeper inside. While unboxing, I did not get the feeling that it may be old/returned lens. But this mark on lens make me wonder if it is a concern. I am not sure if it would affect my pictures. I ordered it for my trip to Arizona and it’s coming up in about a week. It would be a bummer to return the lens now as I won’t receive another one in time. Feeling kind of stuck! Please help.