But my dealer was baffled as they said due to the design of the Rodie, it was less prone to flare then my Schneider and that didn't display any of these issues. I shot various images within a 180 degree radius to move the position of the sun (behind the clouds) and that didn't make any difference.I have Seen these spots before, from my experience they come from faulty shading. I could easily remove them by adjusting the lens hood. However, I have seen this effect strongest on the 150mm Schneider.
Seems an odd lens design if it can''t shoot outdoors on overcast days without extreme lens shading.
Anyway, just thought it was worth mentioning....