Just received the lens and was wondering if these marks are significant enough to where I should return it. I paid $45 for the lens and the seller didn't specify they were on it, which was a risk I was willing to take for $45. I have an adapter coming in Wednesday but would like to know if I should just return this now or not. My question is, are these bad enough to where they will affect the picture significantly? From the camera-side loking outward towards the front of the lens: Thanks!