I've noticed some ghosting in evening shots, but those are extended exposures, so I'll just remember to remove it at that time, so thanks for that advice. Asides from that, I think I'm going to keep my UV filters on all of my lenses ($100 in filters protecting $3750 in lenses). I didn't start using the filters to protect the glass anyway... I did it to protect the protective and filtering layers that are placed on the front elements. I'll try to find some time to go out and test other shots with and without the filters though.