tommydif wrote:
I think that I may have figured it out. These photos were taken in Jamaica, WI, and it is possible that, in taking the camera from an air conditioned room into the humid outside world, I may have gotten some condensation on the filter. I just took some pictures of a blank wall back home in NY, with and without the filter, and the effect is gone. Lesson learned, I guess.
solid gray or dark gray spots, mostly round.