I have successfully constructed a prismatic telescope with a fairly sharp, erect image. However, I was disappointed to discover that the image was vertically flipped! That is, in real life, there would be a car on the left and a man on the right. When looking through the telescope, the image seen shows the car on the right and the man on the left... its flipped! =o I would greatly appreciate if someone could tell me how to remedy this problem... if it is even possible to remedy it... And why does this occur?? Many thanks!!