In the first shot I had a 4 foot rail parallel with the subject. I wanted the subject to stay directly centered in the shot for the duration of the clip. At one shot every 15 seconds for 2 hours the camera moved along the rail while the mount panned to keep the subject in frame. I think this went very well considering that my calculations on distance traveled and the angle I need to pan to keep the subject in frame wasn't exactly certain.
The second shot I did a 40 degree incline up a 6 foot rail with a 35 degree tilt down and 35 degree pan right. I wanted the subject to be close to the camera in the begining and eventually end up in the bottom right corner, boy was I off. Still 15 sec intervals for 2 hours. I even turned the clock mechanism on my prototype logo on so you can watch time pass. About 45 minutes into the shot I second guessed my panning speed and sped it up a little bit, which caused the subject to bounce clear to the other side of the frame. Also as you can tell the tilt may have been a little excessive.
The last clip is a GOPRO of the previous shot showing the movement of the camera as it travels up the rail while simultaneously panning and tilting. You can even see me step in and turn the speed up on the tilt.
This was a test to see how accurate I could get my camera to track a subject and how accurate I could keep a subject in frame while using 3 axis movement.
canon t2i w/18-55 lens
Go Pro hero2
Dynamic Perception Stage Zero
Merlin telescope mount