Paul, As I said in another post, I cannot see how pointing the camera in any particular direction would affect what is recorded. What I have since been working on is the fact that the camera is not moving with the axis of rotation for the annual trail but is for the nightly trail. I am trying to get a grip on how this effects what we should expect to see. JA Paul Deema <paul_deema@xxxxxxxxxxx> wrote: J A -- was my explanation of the incorrectness of your very elaborate illustration lacking in some manner in your estimation? I think this is important. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com