I'm testing out my "new" (used) camera and have a few images with a very strange phenomena on them. Is this lens flare? A lens problem? Or a processing problem? I have pointed out to the lab many marks left on my negatives and after showing him these, he said this came from the camera. I've never seen flare like this so am not sure what to believe. This mark only appeared on 2 images out of 5 rolls of 6 x 4.5 negative film. Any comments? Thanks!