👉 A teinoscope is a type of telescope used for astronomical observations. It consists of two telescopes, one on each side of the main objective lens that are connected by a connecting rod and a focusing ring. The two telescopes are positioned in front of each other so that they face towards the Earth. The connecting rod allows the two telescopes to be moved closer together or separated from each other depending on the need for observation or focus. Each telescope has its own objective lens, which is used
