Thanks for the responses everybody. Good to hear that this is normal for the lens. I do use a filter on it, but it sounds like that should not be what's causing this. When I use this lens I usually use it wide open because I'm going for that "special 1.2 look." Also I feel like since I paid so much more for this compared to the 85 1.8, I feel obligated to shoot wider than 1.8 ha ha ha. Yeah, I hadn't really noticed this "feature" on the lens until recently (probably because of all the christmas lights up around my house) and now that my eye knows to look for it I can't help but see it. It doesn't really bother me, it's just one of those things you can't unsee once you know it's there.