The traditional company Bresser offers telescopes for ambitious beginners at an excellent price-performance ratio under the name Messier. The Messier telescope systems are expandable and retrofittable, so they can be used far beyond the initial entry point.The achromatic refractor AC 90/500 offers good light gathering performance due to its large aperture of 90mm. The focal length of 500mm ensures a particularly large field of view.
The two properties allow very impressive widefield observations of open star clusters and the Milky Way. This instrument is not only interesting for the beginner, but also for the experienced observer. If, on the other hand, you mainly want to observe the Moon and planets, a lens with a longer focal length would be better, for example the AC 90/900.