Damn..... We must be talking about different parts of the image then... I can see the small pink thread. But next to that... http://www.ipix.lt/images/73118790.jpg Please.... Someone spare me.... My monitor is 22". I just got lenses today. Must be God punishing me for all the "trolling".
It's another tread just as the one you marked. You can even see the shadow on the left side, as amp already said.