What kind of telescope did Johannes Kepler describe in Dioptrice?

In his 1611 work Dioptrice, Johannes Kepler described a new type of instrument now known as the Keplerian telescope.12

Unlike earlier designs, this telescope utilizes two convex (convergent) lenses. In this configuration, the eyepiece is a convex lens placed behind the focus where light rays converge, which produces an inverted image. While this design requires a longer tube length due to the intermediate inversion of the image, it serves as the foundation for the modern refractive telescope.12