Observe a funny situation.
My panny GM5 (with 12-32mm lens) got 6 dust spots, 3 on upper left edge, 3 on lower right edge.
At the widest focal length (12mm), the spots are about 10cm from the edge of my PC monitor. (at 100%)
But when the focal length is at (28mm), the same spots are about 12cm from the edge.
As you zoom in, the dusts 'move' towards the lens center.
Is this possible ?