Hi Andy

I have seen this effect a number of times and I don't like it, just wanted find out what causes it. I used to think it was branches and leaves moving, but if you look at the edge of the fence palings (light to dark transition) you can see it there as well.

If I had 1% of the ability of Joel, Bob W or Denise I could earn some money out of photography, alas I will just have to do this for fun.

Tony