houkuttelevasta
Houkuttelevasta, also known as the "pulling telescope," is a type of reflecting telescope that uses a unique optical design to achieve a long focal length in a compact form. It was invented by the German astronomer Bernhard Schmidt in the 1930s. The houkuttelevasta consists of a primary mirror, a secondary mirror, and a field lens. The primary mirror is concave, while the secondary mirror is convex. The field lens is placed at the focal point of the primary mirror and is used to correct for spherical aberration, which is a common issue in reflecting telescopes.
The houkuttelevasta is known for its ability to provide a wide field of view while maintaining a
Despite its advantages, the houkuttelevasta has some limitations. It is more complex to design and manufacture
In recent years, the houkuttelevasta has seen a resurgence in popularity due to advances in manufacturing techniques