So I was messing around with my Canon 50mm 1.8 lens today taking some pictures of wall fixtures and noticed that the imges were a bit blurry. I switched over to manual focus, advusted the focus, and took a picture and then compared it with the AF shot taken and there was a huge difference. Having read the latest posts on here about filters I decided to take my filter off and try it out. I took some shots with AF and they turned out very sharp. So for some reason the filter is messing up my AF... Anyone ever had this happen? What can I do besides just leave the filter off? My filter is a Canon UZ HAZE filter by the way.