nigelswift wrote:
See this -
http://www.youtube.com/watch?v=6IsOPkfWYBI&feature=channel
There are a couple of examples of previous Rolls " unfortunately they change position as you point out ,or the sun only rolls for a small section of the slope or the sun moves " into or away " from the slope " ,both easily achieved .There is only one point where the whole sun rolls down the entire slope keeping , a constant relation between both edges and no change of position is needed to film it . http://www.youtube.com/watch?v=6IsOPkfWYBI&feature=channel
As predicted, said to be deliberate. Great sequence though. Shame they moved the camera to preserve the effect. Suggests the roll isn't quite parallel - but if they'd shown the sun a little above the slope like the other one does it would have worked without needing to shift position. You can tell that by referencing the position of the tree lined up with the extreme left edge of Silbury which stays the same through most of the sequence.