Hi Geo,
please stop that next and next and next modifications and do some tests first otherwise we'll never come to a result.
best idea you put the ring onto some nylon cord and pull it with some small thread from 1 to other olive tree (distance 20meters)
PD remains fixed at one and the same position some meters away from you.
(you will stay near the olive tree where in which directions the ring is pulled and hold camera in other hand)
next you change position of fixed PD place circular around the rope 65 degrees, not 90°, same distance.
best if there's a third tree nearby so you can change the rope for getting more directional distance.
some "phenomens" look simple but they are not. the pearl moon doesnt follow the car if its moving straight into one direction and from an absolute point of view the sun doesn't move across the earth. thats why we always need finding out the real factors that are effective if we want to gain useful knowledge.
greets and thx for your help
