I shot this one this afternoon with my brand new 70-300 and got this weird green artifact from the bright lights, or at least I assume that is what they are. I have never seen something quite like this, so what I'm wondering is if anyone knows what would cause this and what I could do to avoid it in future. I know I could clone it out pretty easily, but to be honest, the photo isn't especially inspired, so I don't think it's worth the effort and I prefer to get this stuff right in camera as much as possible. Here's the picture: I increased saturation and contrast a bit to make the spots stand out a little more, but besides that I didn't do much in terms of PP. Here are the exposure details: 1/250 s f/5.6 ISO 200 150 mm Thanks!