Hi All ...
Making your very own telescope is really easy. It's knowledge of lenses that you will need to make your own one.
The logic is the same as the lenses used in spectacles. Light which follows a straight path will pass through the first lens and its rays will get converged. When they pass through a second lens, the effect will be that of the distant object appearing nearer.
It's really really simple and less time consuming to make your own telescope. Watch this Youtube video to get the full idea ..... Enjoy