- #1
crx
- 81
- 0
i have a little telescope of 70mm in diameter and 600mm focal length, its just good too see ...birds, but when i use the 9mm eyepiece and zoom to a star , the star's image will quickly pass to the vision field because of the rotation of the Earth. What i observed could be just an, optical illusion but it seems that the movement of the star in the image its not constant but its jerking, its like a non uniform motion , ...have any idea?