Thanks for the idea's.

It does still get the same result when played from hard drive. I don't think it can be the fields having been swapped, it seems that if that was the case, when separating the fields it would be left looking clean. Perhaps I'm wrong in that though.

The shutter speed thought seems to make sense. But it still leaves the fact that it looks clean when viewed on the camera's display.

I'm going to try and sort it out to test capture a bit on a computer with a matrox card and see how that goes. If it's the same, then it's a reshoot with some shutter speed expermentation by the looks of things.

Thanks again,

David.