Pretty much summed up in the post title, will UV/protective filter affect AF performance, in terms of accuracy?
My 85mm 1.8 misses focus sometimes, even in good/decent light. But when I do focus test with tripod and static object, it's dead on. Tried every MA adjustment available, and it seems to be best at 0.
Maybe the filter create some kind of 'ghost image' that affect the AF accuracy, because, AFAIK, the AF system detects contrast, right?
FYI, I use Hoya HMC UV and Kenko MC UV.
Thanks for all your advices.