I only use this lens with the adapter and filters on my M9M and MP and I noticed that every now and then I'll get images that appear to have reflections of other parts of the scene in either the upper corners or the upper middle of the frame. I'm was guessing the reflections were caused by light coming at specific angles or through the vents at the top of the adapter. I recently returned from Yellowstone and developed a roll and I noticed that one of the frames had a reflection in the upper corner of the frame (within the sky) of some branches that are in the lower half of the frame. What's really strange is that while I shot a number of frames of the same scene, on a trip pod simply adjusting the shutter speed and nothing else, the reflection only appears in one frame. I'm at a loss on what could be causing these random reflections and how to eliminate or at least reduce the frequency of them appearing. Anyone has any suggestions or ideas?