Upon some further examination- it looks like the aperture on my lens (kern switar poe bayonet) when all the way closed down, has a leak around the outside the edge of the iris. It looks like a large "c" inside of the lens. Is it possible that this is what the problem is? In the dunes I was all the way closed down, but in the graveyard I was at f8 or so, reducing the gap around the iris diaphragm... either way, looks like I need some major repairs... not to mention the registration jiggle.
thanks!